Changes to add postgresql compatibility
Update postgres install for latest changes
removed email shipping method from postgresql install

As per mysql change bac0a9e
Merge branch 'postgresql' of https://github.com/kwirk/eventgallery
removed strict warning
removed useless character
fixed exception which occurred while deleting a file
fixes warning in finder plugin during folder renaming
fixes sql exception
fixes strict warning
additional changes to introduce PostreSQL support
added some small fixes due to the PostgreSQL support merge
readded strict warning but fixed error with Joomla 2.5
some fixes to the Joomla 2.5 legacy css to make the sorting boxes readable.
fixed button color for primary button in the Joomla 2.5 legacy css
removed info box on order confirmation page.
changed add2cart button on single image page from icon to text to have the same pattern for this button on every page
Improved content plugin.
fixes PostgreSQL merge issue: event shows up multiple times in back end if there are comments for this event.
- after deleting an event the files and comments are gone now too.
- renaming an event results in renaming the lineitems too.