PyLoader v0.03

This is a preview release. Breaking changes might occur.
Changes,

1. Add an update checker
2. Cleaned up code
3. Fixed a startup crash #5
4. Scripts can now be loaded/unloaded during runtime
5. Added script.get_file_name()
6. script.load, script.unload, script.reload, script.get_desc, script.get_author, script.get_name, script.get_file_name, script.get_version now takes script name as optional argument. More in wiki
7. Added a reload_all example