Removed empty constructor.
Request classes for Symfony2 and Zend Framework 1.
Improved error reporting on invalid signature.
Throw Exception when header is empty.
Merge branch 'master' of github.com:simgroep/oauth1-service
Added emptyHeader() test.

Brings coverage to 100%.
Merge branch 'master' of github.com:simgroep/oauth1-service
Test for SymfonyRequest.
Test for Zf1Request.
Replaced test hostnames with more generic ones.
Simplified Request class, fixed its unit test.
Merge branch 'master' of github.com:simgroep/oauth1-service

Conflicts:
	tests/Simgroep/Oauth1Service/RequestTest.php