SNAG
- [x] make install subcommand actually run the install script
- [x] multiple subcommand handling and proper argument parsing
- [x] add output and error functions for regular program output, make emalloc also have file info, also gen sh to configure
- [x] download packages to download db and verify hash
- [ ] cache download and rename "download" db to source, archive, or release db
- [ ] make unpack source function and run build function actually work
- [ ] snag api
- [ ] proper download with snag api (supports git download)
- [ ] proper installation
- [ ] dependencies

Things to come back to
 - [ ] Optional package info attributes
 - [ ] better memory allocation strategies for snag (temporary, arena)