Make -f option work as expected
Add support for -a option
Add support for --append option
Add support for -R option
Add support for --recurse option
Add support for --exclude option
Merge branch 'feature/improved-console-support' into develop

Fix #9
Merge branch 'develop' into feature/add-memory-limit
Set memory limit in the executable script

It is not part of the "PHPCtags" class' functionality.
Merge branch 'feature/add-memory-limit' into develop
Merge branch 'develop' into feature/improved-console-support
Ensure -R option only applies on directory
Merge branch 'feature/improved-console-support' into develop
Merge branch 'develop' into feature/improved-console-support
Integrate recursive directory generating into PHPCtags
Merge branch 'feature/improved-console-support' into develop
Merge branch 'feature/ensure-source-file-exists' into develop