Revert localization

Let's keep localization-related stuff only in views when possible.
Localize permission key name in bulk add/remove page permissions

Let's use the PermissionKeyName context when viewing
permission key names
Fix charset of exported users list
Fix DateHelper load to lowercase

Fix DateHelper load to lowercase

Fails to load on some PHP installations

- Change to lowercase date
Merge pull request #1336 from mkly/fix_date_nav_helper_include

Fix DateHelper load to lowercase
Fix Negative wrap around in page parents

Fix Negative wrap around in page parents

- Change PageStatistics::incrementParents() to use application math as
  opposed to database math
- Set cChildren to 0 if method would increment to a negative number
Changed profile messages to use defined dateformat
Use predefined constant when defining directories for block types
Improve ajax call to build page url slug

* Disable form submission until ajax request has finished
* Don't do ajax request if page name is the same as the previous ajax
  request
* Take in account the ajax response (success of fail) only if it's for the
  last ajax request.
Simplify call to getValue when called with 2 parameters

If func_num_args() is 2 then we can avoid call_user_func_array
and call $av->getValue() directly (that's faster)
Merge pull request #1332 from mlocati/add-access_user_search_export-permissionkey-to-xml

Add access_user_search_export to permissions.xml
use text helper instead of htmlspecialchars
resolved deprecated function call onkeypress
Fix Upgrade Error with no Administrators Group

Fix Upgrade Error with no Administrators Group

Upgrade fails if Administrators group has been deleted.

- Check for Administrato(via ADMIN_GROUP_ID) and if it does not exist do
  not add it to permissions list
Add link to code submission guidelines page

Add link to code submission guidelines page on concrete5.org
Fix Link in README

Fix Link in README
Fixed menu file paths, some of them were absolute.
add legacy method name & accessibility fix to resolve tab ordering
make area name translatable
Remove on_render_complete from upgrade

Remove on_render_complete from upgrade

Prevent issues with events in upgrades