removed Decimal from Gauss and SDC

not working correctly yet
GaussLegendre node/weights computation working
refactoring; testcase fixes
global variables for PRECISION and DIGITS
some cleanup of tests
fixed global constants
fix required dependencies
probably fix Travis issues
fix stupid typo
fix even more stupid travis bug
I hate my keyboard! Those typos! *argh*
Ubuntu, really?!
remove numpy and scipy from requirements; those cause troubles on self-compile
does this fix travis problems?
so much trouble with travis...
Ubuntu, com'on. just some fortran please.
atlas...
SciPy's travis config might help
remove generated API files
adding docu to existing code