Scriptine

* improve handling of binary data in write_bytes
* fixed path.isdir on windows
* add path.ensure_dir

* new command.cmd function for scripts with only one command
* added command.autocmds as a replacement for run

* fixed missing files in MANIFEST.in

* renamed path.getcwd to path.cwd
* converted properties to methods for values that might
change (e.g. size, mtimes, etc)
* add path.newer method

* first release