[Fix} Mail: allow domains as domain.edu.co
domain without .xx should not validate
reverting checking for dot + changing test to true
Fix "Save as Copy" for article
Fix languages sorting issue
changed one condition to let the tests pass, splited one test in two and used more specifc annotations
Postgres: Install of an additional language fails

I installed the current staging branch using postgresql successfully. Afterwards I tried to install an additional language in the backend but it failed with the following message:

0 Database query failed (error # %s): %s SQL=SELECT "update_id" FROM "aehqu_updates" WHERE element = 'de-DE' AND type = 'language' AND client_id = '' AND folder = '' 

After applying this patch the installation went fine. I borrowed the idea from #1695.
Merge pull request #12 from rdeutz/infograf768/maildoubledot

changed one condition to let the tests pass, splited one test in two
Merge pull request #4905 from infograf768/maildoubledot

[Fix] Mail: allow domains as domain.edu.co
Code style
Merge pull request #4931 from wilsonge/patch-24

Code style
Modify ruleset
Fix outstanding rules
Merge pull request #4929 from wilsonge/rulset

More travis code style checks
Merge pull request #4916 from joomdonation/patch-2

Fix "Save as Copy" for article issue
[imp] Update CONTRIBUTING.md. Closes #4915

Followed the normal style of using the long form 'pull request' once with short form in brackets (PR) which enables PR to be used for the rest of the document. Grammar and small change for readability.
[fix] Add drop column support for PostgreSQL in Extension manager => Database. Fixes #3313.
[Code Style] Remove blanks
Merge pull request #4917 from joomdonation/patch-3

Fix Sorting Joomla! available languages issue
codestyle