renamed tables using standard names

In the frame of this commit were also:
-> added controls over custom management of plugin (public function is_uninstall_allowed()) expecially for surveytemplates
-> corrected the url in `$PAGE->set_url(` in most of the pages
-> fixed the style.css according to the new names of the url in `$PAGE->set_url(`
-> removed useless `if (!$hassubmissions || $riskyediting) {` before the link to manage user templates in tabs.php and in function survey_extend_settings_navigation of lib.php
-> added three $plugin->dependencies in version.php of the colles report
-> made minor fixes

modified:   adminlib.php
modified:   classes/itembase.class.php
modified:   classes/itemlist.class.php
modified:   classes/plugininfo/surveyfield.php
modified:   classes/plugininfo/surveyformat.php
modified:   classes/plugininfo/surveytemplate.php
modified:   classes/templatebase.class.php
modified:   classes/view_export.class.php
modified:   field/age/db/install.php
modified:   field/age/db/install.xml
modified:   field/age/db/upgrade.php
modified:   field/age/db/upgradelib.php
modified:   field/age/lib.php
modified:   field/age/plugin.class.php
modified:   field/age/settings.php
modified:   field/age/version.php
modified:   field/autofill/db/install.php
modified:   field/autofill/db/install.xml
modified:   field/autofill/db/upgrade.php
modified:   field/autofill/db/upgradelib.php
modified:   field/autofill/lib.php
modified:   field/autofill/plugin.class.php
modified:   field/autofill/version.php
modified:   field/boolean/db/install.php
modified:   field/boolean/db/install.xml
modified:   field/boolean/db/upgrade.php
modified:   field/boolean/db/upgradelib.php
modified:   field/boolean/lib.php
modified:   field/boolean/plugin.class.php
modified:   field/boolean/version.php
modified:   field/character/db/install.php
modified:   field/character/db/install.xml
modified:   field/character/db/upgrade.php
modified:   field/character/db/upgradelib.php
modified:   field/character/lib.php
modified:   field/character/plugin.class.php
modified:   field/character/version.php
modified:   field/checkbox/db/install.php
modified:   field/checkbox/db/install.xml
modified:   field/checkbox/db/upgrade.php
modified:   field/checkbox/db/upgradelib.php
modified:   field/checkbox/lib.php
modified:   field/checkbox/plugin.class.php
modified:   field/checkbox/version.php
modified:   field/date/db/install.php
modified:   field/date/db/install.xml
modified:   field/date/db/upgrade.php
modified:   field/date/db/upgradelib.php
modified:   field/date/lib.php
modified:   field/date/plugin.class.php
modified:   field/date/version.php
modified:   field/datetime/db/install.php
modified:   field/datetime/db/install.xml
modified:   field/datetime/db/upgrade.php
modified:   field/datetime/db/upgradelib.php
modified:   field/datetime/lib.php
modified:   field/datetime/plugin.class.php
modified:   field/datetime/version.php
modified:   field/fileupload/db/install.php
modified:   field/fileupload/db/install.xml
modified:   field/fileupload/db/upgrade.php
modified:   field/fileupload/db/upgradelib.php
modified:   field/fileupload/lib.php
modified:   field/fileupload/plugin.class.php
modified:   field/fileupload/version.php
modified:   field/integer/db/install.php
modified:   field/integer/db/install.xml
modified:   field/integer/db/upgrade.php
modified:   field/integer/db/upgradelib.php
modified:   field/integer/lib.php
modified:   field/integer/plugin.class.php
modified:   field/integer/settings.php
modified:   field/integer/version.php
modified:   field/multiselect/db/install.php
modified:   field/multiselect/db/install.xml
modified:   field/multiselect/db/upgrade.php
modified:   field/multiselect/db/upgradelib.php
modified:   field/multiselect/lib.php
modified:   field/multiselect/plugin.class.php
modified:   field/multiselect/version.php
modified:   field/numeric/db/install.php
modified:   field/numeric/db/install.xml
modified:   field/numeric/db/upgrade.php
modified:   field/numeric/db/upgradelib.php
modified:   field/numeric/lib.php
modified:   field/numeric/plugin.class.php
modified:   field/numeric/version.php
modified:   field/radiobutton/db/install.php
modified:   field/radiobutton/db/install.xml
modified:   field/radiobutton/db/upgrade.php
modified:   field/radiobutton/db/upgradelib.php
modified:   field/radiobutton/lib.php
modified:   field/radiobutton/plugin.class.php
modified:   field/radiobutton/version.php
modified:   field/rate/db/install.php
modified:   field/rate/db/install.xml
modified:   field/rate/db/upgrade.php
modified:   field/rate/db/upgradelib.php
modified:   field/rate/lib.php
modified:   field/rate/plugin.class.php
modified:   field/rate/version.php
modified:   field/recurrence/db/install.php
modified:   field/recurrence/db/install.xml
modified:   field/recurrence/db/upgrade.php
modified:   field/recurrence/db/upgradelib.php
modified:   field/recurrence/lib.php
modified:   field/recurrence/plugin.class.php
modified:   field/recurrence/version.php
modified:   field/select/db/install.php
modified:   field/select/db/install.xml
modified:   field/select/db/upgrade.php
modified:   field/select/db/upgradelib.php
modified:   field/select/lib.php
modified:   field/select/plugin.class.php
modified:   field/select/version.php
modified:   field/shortdate/db/install.php
modified:   field/shortdate/db/install.xml
modified:   field/shortdate/db/upgrade.php
modified:   field/shortdate/db/upgradelib.php
modified:   field/shortdate/lib.php
modified:   field/shortdate/plugin.class.php
modified:   field/shortdate/version.php
modified:   field/textarea/db/install.php
modified:   field/textarea/db/install.xml
modified:   field/textarea/db/upgrade.php
modified:   field/textarea/db/upgradelib.php
modified:   field/textarea/lib.php
modified:   field/textarea/plugin.class.php
modified:   field/textarea/version.php
modified:   field/time/db/install.php
modified:   field/time/db/install.xml
modified:   field/time/db/upgrade.php
modified:   field/time/db/upgradelib.php
modified:   field/time/lib.php
modified:   field/time/plugin.class.php
modified:   field/time/version.php
modified:   format/fieldset/db/install.php
modified:   format/fieldset/db/install.xml
modified:   format/fieldset/db/upgrade.php
modified:   format/fieldset/db/upgradelib.php
modified:   format/fieldset/lib.php
modified:   format/fieldset/plugin.class.php
modified:   format/fieldset/version.php
modified:   format/fieldsetend/db/install.php
modified:   format/fieldsetend/db/install.xml
modified:   format/fieldsetend/db/upgrade.php
modified:   format/fieldsetend/db/upgradelib.php
modified:   format/fieldsetend/lib.php
modified:   format/fieldsetend/plugin.class.php
modified:   format/fieldsetend/version.php

this is a very dangerous improvement because the rename of all the plugin tables (almost all the tables managed by the module) may cause errors wherever