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
Merge branch 'patch-23' of https://github.com/siad007/phpDocumentor2 into siad007-patch-23

Conflicts:
	composer.json
	src/phpDocumentor/Application.php
#1324: Moved manifest to webserver

Because we do not want to rely too much on Github we host our own history of
phar files and want to store the manifest with them.