Remove version field from composer.json

It only causes problems.
Remove class_path option

* Silex no longer has an autoloader
* Composer handles this just fine
Merge pull request #10 from igorw/patch-3

Remove version field from composer.json
Add branch-alias to composer.json

This allows requiring version ~1.0@dev instead of dev-master.

Please tag v1.0.0 soon.
Merge pull request #13 from igorw/branch-alias

Add branch-alias to composer.json
Merge pull request #11 from igorw/rm-classpath

Remove class_path option
Fixing README. Closes #14. Removed unused parameter from provider.
Merge remote-tracking branch 'upstream/master' into plugin-param

* upstream/master:
  Fixing README. Closes #14. Removed unused parameter from provider.
  Add branch-alias to composer.json
  Remove class_path option
  Remove version field from composer.json

Conflicts:
	GuzzleServiceProvider.php