Fixed an issue with empty responses.
Updated changelog.
Merge branch 'master' into 3.0

Conflicts:
	lib/jyggen/Curl/Response.php
	readme.md
Added testAddMultiHandleWithErrorCode
Refactor Curl to make it more testable.
Don't pass $dispatcher by reference.
Added dark magic to somewhat test issue #5.
Bump version to 2.1.
Added 2.1 changelog.
CS fixes.
Added test to Curl constructor.
Merge branch 'master' into 3.0

Conflicts:
	lib/jyggen/Curl.php
	readme.md
Fixed merged references to Session.