added +1 to month to get proper month in time_date.js
added tests for files.js and time_date.js but they are incomplete test files -- just getting the hang of testing. More soon!
time and date tests
create time and date tests, fix month
Merge pull request #172 from shiffman/master

Refactor of trig functions and tests
merging PR 164
rebuilding p5.min.js