Added bisection search function.
Fixed issue with indentation.
Added initial implementation of inverse function.
Exported inverse function.
Added tests. Discovered need to broaden initial interval guess.
Removed incorrect comments.
move to src folder
make the tests a proper test-framework suite
copyright
move Atmosphere module
relax dimensional upper version constraints
clean up dimensional versions
drop tuples, only use Atmos data

closes #2
whitespace
-Wall
additional tests for inverse pressure
move _REARTH and _GMR into Constants
replace bisection with analytical formula for pressure -> altitude
version bumps for hackage release
add travis-ci