Renamed Session to Request.
Merge branch 'master' into 3.0

Conflicts:
	lib/jyggen/Curl/Response.php
	readme.md
Merge branch 'master' into 3.0

Conflicts:
	lib/jyggen/Curl.php
	readme.md
Fixed merged references to Session.
Always return an array from Curl.
Updated readme.
Updated symfony/http-foundation to ~2.3.
Prepare 3.0 release.
Updated changelog.