Housekeeping: Added default properties for source directories
Housekeeping: Made composer target configuration public
Fixed: Linter should lint content of php source directory
Housekeeping: More sane default archtype/profile to test phpunit extension
Fixed: Wrongly named property reference
Fixed: unused property declaration
Implemented: Simple macro to run arbitrary phpunit commands
Implemented: Very simple PHPUnit:Test extension

Does not execute tests for now, but simply calls phpunit --help
Fixed: Bootstrap target dependency chaining
Housekeeping: Moved spawn-ant from Core to Execution