fix small typo
copy products fragment: add projections & lines

for now, they’re just duplicates
duplicate classes as well
clean unneeded stuff from products
cleaning continued

missing things from last commit
use the new duplicate fragments (prjs & lines)
more work on products fragment

work on showing “result” and clear button functionality
change MATHTools to MathTools in README

at least for now, have to think about it later
change to MATHTools and add logo to README
Merge pull request #2 from aminb/dev

Fair bit of progress on the app + addition of logo