Merge branch 'pgsql-driver'
Force travis to create a postgresql test database
Removed conditional pgsql env
Merge remote branch 'upstream/master'
Multilevel Items
Removed unused columsn from find constraint sql. Fixed typo. Added extra schema check for when a foreign table is not in the same schema. Updated indentation to conform to other classes.
Updated code style. braces on the same line for control statements.
Merge pull request #516 from m-o-g/master

Multilevel Nav items
[1] Redone missing code.
[2] Added empty line at the end of file
[3] Removed exception.
Merge pull request #517 from gevik/pgsql-small-fix

Pgsql small fix  (update 2)
coding style fix.
Response WIP
Merge branch 'master' of github.com:yiisoft/yii2
Fixed test break.
renamed backstage → backend
fixed init.bat paths