Fix: (BDD) typo in Content Type Group feature sentence
Fix EZP-21813: API Exception when having comment policy with limitation
Fix EZP-23630: Add support for image alias post processors

> https://jira.ez.no/browse/EZP-23630

This makes it possible to define post processors for LiipImagineBundle
in siteaccess configuration.
Deprecate Location->pathIdentificationString as it is planned to be removed in 6.0
Fix EZP-23552: Symfony cache won't be cleaned if Legacy ViewCaching is disabled

> https://jira.ez.no/browse/EZP-23552

This enforces `ViewCaching` to be enabled when going through Symfony.
This is mandatory for persistence/HTTP cache to be correctly cleared.

To avoid pitfalls with having ViewCaching always enabled (e.g. having to
clear cache on each change in a legacy template), one might just enable
`site.ini/TemplateSettings/DevelopmentMode`:

```ini
[TemplateSettings]
DevelopmentMode=enabled
```

Closes #1086
[Travis] Change travis scripts to make sure hhvm is able to run
[Composer] Allow sensio/distribution-bundle ~3.0, in addition to ~2.3
Merge pull request #1088 from ezsystems/get_hhvm_tests_running_again

[Travis] Change travis scripts to make sure hhvm is able to run
Merge pull request #1075 from joaoinacio/bdd_contenttypegroup_typo

Fix: (BDD) typo in Content Type Group feature sentence
Merge pull request #1080 from ezsystems/EZP-21813

Fix EZP-21813: API Exception when having comment policy with limitation
Fix EZP-23632: Exception when running eZ Publish behind built in reverse proxy
Merge pull request #1089 from ezsystems/fix_EZP-23632_reverseUserContextRegression

Fix EZP-23632: Exception when running eZ Publish behind built in reverse proxy
[Integration tests] Fix some skipped tests
Fix EZP-22276: URI templates in Root resource should use query expansion format

> https://jira.ez.no/browse/EZP-22276

Updated REST spec according to [URI template RFC](http://tools.ietf.org/html/rfc6570#section-3.2.8)
EZP-23653: shortened path to API tests fixtures
Fix EZP-23643: Search with permissions turned off results in UnauthorizedException
Merge pull request #1094 from ezsystems/EZP-23653-api_test_fixtures_path

EZP-23653: shortened path to API tests fixtures
Merge pull request #1090 from ezsystems/search_load_permission_fix

EZP-23643: Search without permissions throws UnauthorizedException
Fixed NotFoundHttpException PHPDocs of ViewController class