major refactoring starting
remove expose.js
remove dependencies not needed anymore
add coveralls reporting
badges, reason for forking
correct branch in codeship, mixed up coveralls and coverage makes
some space
add default errors
add date function
update jStat
add utils
add parseBool
covered some math-trig functions
add compatibility aliases
add datevalue function
add day function
add days function
add days360 function
add edate function
add eomonth function