fix to enable import of answers from a different installation/version of LS
Fixed issue #06918: Make Group Members user list work in same way as
Survey Permissions
Corrected a typo on variable name (table_start_index).
Made fallback import optionnal and disabled by default.
Added code to check if at least one answer field could be imported
before committing import.
Merge pull request #139 from cuali/issue06918

Fixed #06918: Make Group Members user list work in same way as Survey Permissions
Dev Added removeResponse function for removing a response from a plugin.
Merge branch '2.05' of github.com:LimeSurvey/LimeSurvey into 2.05
In invite admin, hide buttons the user isn't allow to use.
Merge pull request #143 from Grapsus/fix_invite_controls_205

In invite admin, hide buttons the user isn't allow to use.
Make sure the number of columns is sufficient in force import.
A few styling changes.
Merge pull request #138 from Grapsus/fix_import

enable LS to import answers (.vv) between different installations/versions
Dev Fixed issue with table names in Windows. Now plugin prefix is
converted to lower case by default.
Dev Added checkAccess support to Api object.
Dev Added support for buttons in plugin settings helper.
Dev Added createUrl function to Api object.
Dev Improved URL support for plugin settings.
New feature: Added beforeLogout and afterLogout events for authentication plugins
Changed feature: made server key configurable in AuthWebserver plugin, default is REMOTE_USER
Dev: wrong label in admin interface
Fixed #8216: Unable to get results when timing is on (ambiguous column id)
Merge branch '2.05' of https://github.com/LimeSurvey/LimeSurvey.git into 2.05