Start of topic 5 (added variables and category)
Cleaned up .gitignore
attempt to clean up version mess
code cleanup
renamed folders
ETK! also renamed and restructured everything
commented unused chem code untested build 1.2.0
added some topic 5 sub cats and formulas

Signed-off-by: Alex Coll <alex3yoyo@gmail.com>
restructured everything, uses ETK for build, more topic 5 & 6
Finished topic 5
Added topic 6 formulas and units
build script modifications
more build script modifications
build file modifications
Build
Merge branch 'feature/topic6' into develop
stuff
Cleaned up build.sh, removed luna building
fixed miscategorization in topic 6
updated version
built version 1.2.1.1