add testcase for issue #124

also add the new needed Token
add T_CLASS to alternativeMap for T_DOUBLE_COLON context

also change test to test for the now used Token
Closes #124: Support new magic ::class constant
Implemented support for Generator syntax (yield) in PHP 5.5.
Merge branch 'master' of github.com:pdepend/pdepend
Cache version bumped.
Housekeeping: Superfluous code removed.
Superfluous use statement removed.
Some requirements for PHPMD added.
Make dev-master alias as 2.0
Fix composer executable when dependency.
Merge pull request #148 from beberlei/PDependComposerBinAutoloadFix

Fix composer executable when dependency.
Merge pull request #147 from beberlei/ComposerBranchAlias

Make dev-master alias as 2.0
Also render coverage value to reports.
Use autoload and perform a conditional include_once
Flag this development version as a beta release.
Version number bumped in composer.json
Merge branch 'master' of github.com:pdepend/pdepend

Conflicts:
	composer.json
Use latest tools.
Housekeeping: All *::CLAZZ references removed.