fix for #1094
removed print statements
added setters and getters for t1 and t2
fixed bug
pep8 fixes to test_timerange
changes to API, removes t1 and t2 from public API
moving props to higher up in code for visibility
fixes to tests
bug fixes in timerange
removed unneeded test and bug fixes
updates to doc string and new test for start < end
updates to doc strings
bug fix
error check based on comment
added test for input error
Merge remote-tracking branch 'upstream/master' into timerange
Update to CHANGELOG
API fix to rest of code
API bug fix
fixed 2.6 compatibility