Use "php -l" for lint checking and not PHPUnit

[sb]

• Add a lint target to the default build.xml file that runs php -l on all *.php files of the project.
• This should be the first task after checkout.
• Other tasks depend on the new lint task.
• Invoke PHPUnit with --no-syntax-check to speed up test execution.

[sb]

Milestone phpUnderControl 0.5.0 deleted

[proofek]

Please see implementation on branch  ticket-675

[mapi]

Fixed. Thanks to proofek who has provided a fix on  github.