isModuleInstalled added to BackendModel
Changed name to isInstalledModule()

Conform functions like BackendAuthentication::isAllowedModule() and
isAllowedAction().
Removed BackendExtensionsModel::isModuleInstalled()
Replaced BackendExtensionsModel::isModuleInstalled() by BackendModel::isInstalledModule()
renamed isInstalledModule to isModuleInstalled
Remove deprecated function
fixed login sql error on wrong email
Location widget address fixed
email module now supports live.com via encrypted protocol SSL/TLS
Removed wrong line from Frontend Pagination

Apparently something went wrong on previous pull-request.
Changelog updated
Merge pull request #431 from siesqo/frontend-linefix

Removed wrong (unneeded) line from Frontend Pagination
updated code after feedback
update html5 shiv
deleteThumbnails function added
beter message
Upgrade to Spoon 1.3.7.
Use Spoon config setters so the debug level is set.

Fixes #413.
Resolve conflicts.
Upgrade Symfony components to 2.2.