Added pharupdate lib to composer
Added UpdateCommand
added manifest
Added mapping git-version to package_version
Added version handling and added update-command
Updated example call inside class comment
Changed version for dependency
Added schema
Added support for update major versions as option
Added option to allow pre-release version update
Split long method and reformat code style
Added missing arguments
Updated doc-block
Fixed method call.
Only add update command for using it in phar context
Added optional argument to specify version number
check current working directory for composer.json
Add HHVM compatibility

In this commit we have made the changes that are necessary to run phpDocumentor
using HHVM. HHVM currently does not support the Phar::running() method, which
does also mean that unexpected side-effects may happen when running the PHAR file
from HHVM.

The most important side effects when running the Phar file is that HHVM will load
the DOMPDF extension, which normally fails under Phar, and that under windows paths
may not be converted correctly in some cases.

The latter is not important at this moment because HHVM does not run in Windows
anyway.
added testcase for LoggerHelper
Allow ZF 2.3 in projects using phpDoc