v0.1.5

This release is another build system update. The top-level Makefile now
builds everything and causes all runtime resources (other than the
configuration file) to be embedded into the binary. Source code,
documentation, and IA documentation are also embedded, for easy AGPL
compliance and ease of access. However, this does mean that a working
LaTeX installation is required to compile.

There are two minor program logic enhancements too:
- Check course group constraint first when choosing
- Send course number immediately on user interaction
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