Added improvements to build script:

- Now uses Python argparse for cleaner handling of arguments
- Added function documentation
- Removed a few unneeded functions
- Updated nightly logic to incremement minor version
- Added support for building from specific branch or commit
- Changed --no-stash option to --no-uncommitted for clarity
- Added a --release flag, default package output will now contain the branch and commit hash in the version number
- Static builds are now listed as an architecture
- Removes iteration from output package filename