make the config for tinymce generic

when one is adding configuration options for tinymce
into config/tinymce.yml, it was only possible to change
existing options in sprocket_helper options. I changed
the behaviour so that it's now possible to add any
oprions into config/tinymce.yml. Every key / value pair will
be added to tinymce.init()

Important: it is not checkd if the options are valid or the syntax
is correct
dropdown for site selector

added a dropdown as a select field if there are
more than one sites created. The dropdown will
automatically link to the other site.
Merge pull request #36 from sumcumo/make_tinymce_config_generic

Make tinymce config generic
update gemspec
Merge branch 'master' of github.com:melvinsembrano/cms-fortress
Merge branch 'dropdown_for_site_selection' of github.com:sumcumo/cms-fortress into sumcumo-dropdown_for_site_selection
updated the site selector
Merge branch 'sumcumo-dropdown_for_site_selection'
made page status localized
updated gemspec version
create locale files stub