Docs: Note about branch merging
Postgres compat in SQLQueryTest
Postgres compat in MemberCsvBulkLoaderTest and GroupTest
PHP 5.5 CI, don't allow failures for sqlite3 and postgres
Merge pull request #2196 from chillu/pulls/travis-matrix

PHP 5.5 CI, don't allow failures for sqlite3 and postgres
Use preg_replace_callback over preg_replace with e modifier
API HTTP::urlRewriter with (string)$code deprecated in 3.1. Fixed regressions and CSS urls.

urlRewriter will expect a callable as a second parameter,
but will work with the current api and simply raise a deprecation error.

HTTP::absoluteURLs now correctly rewrites urls into absolute urls. Resolves introduced in c56a80d6ce

HTTP::absoluteURLs now handles additional cases where urls were not translated.

Test cases for HTTP::absoluteURLs added for both css and attribute links.

Cleaned up replacement expression and improved documentation.
Removes PHP 5.5 from allowed failures
Merge branch '3.0' into 3.1

Conflicts:
	.travis.yml
	control/HTTP.php
	email/Mailer.php
	tests/control/HTTPTest.php