2.4.1-dev
Pass JSHint validation
Merge branch 'jshint' into QA_2_4
Allow to assign custom proxy address. Fix #15
Add README section on using your own proxy server
Use double quotes in README code samples
Merge remote-tracking branch 'origin/QA_2_4' into develop

Conflicts:
	CHANGELOG
	codebird.js
Update CONTRIBUTING notes to reflect the changes for git-flow
Add README section about authentication using a callback. See #16
2.4.1
API parameters with escaped characters fail in IE7-9. Fix #19
2.4.1 release date
Merge branch 'release/2.4.1'