Fix several potential compilation issues on various platforms, fix ElectricGuitar script, fix version number, add McGill logo.

- Version number was 4.4 instead of 4.4.4.
- Some compilation errors in debug mode on some platforms.  (one const, one extra bracket)
- Ran into a case error when cross-compiling for Windows.
- The ElectricGuitar script failed on case-sensitive file systems.
- The McGill logo was missing from documentation, even though it appeared in release tarballs.