Added `applyCwd()` shortcut functions for the ones in `FileUtil` using the specified tool argument `--cwd` (#32)
Properly applying the effect of the `--cwd` command line argument (#32)
Fixed error message about file not existing when using `--local`, `--user` or `--system` (see ceylon/ceylon-compiler#761)
Added constants and helper methods for the compiler configuration options `NoOsgi` and `Pack200` (see ceylon/ceylon-compiler#275)