Python-datemath

fixed
- FIX: [Issue 21](https://github.com/nickmaccarthy/python-datemath/issues/21) - Fixed an issue where if timezone offset was in a datetime string (ISO8601), the timezone of the returned datemath object would be UTC and not the timezone as specified in the datetime string.

fixed
- FIX: [Issue 15](https://github.com/nickmaccarthy/python-datemath/issues/15) - Fixed issue with parser finding invalid timeunits and throwing correct errors
added
- Feat: [Issue 16](https://github.com/nickmaccarthy/python-datemath/issues/16) - Added support for parser to accecpt a epoch/unix timestamp but throw an error on epoch milli's since arrow can't support that.

fixed
- [Issue 12](https://github.com/nickmaccarthy/python-datemath/issues/12) - missing VERSION.txt. Added MANIFEST.in for sdist build
- [PR 13](https://github.com/nickmaccarthy/python-datemath/pull/13) - Fix `BaseException` to `Exception` inheritence, thank you for your contribution yury-primer!

** PLEASE DO NOT USE THIS VERSION, use `1.5.0+` instead. This may not compile on your system due to a missing VERSION.txt which was fixed in `1.5.0+` **

fixed
- [FIX] [Issue 9](https://github.com/nickmaccarthy/python-datemath/issues/9) && [Issue #8](https://github.com/nickmaccarthy/python-datemath/issues/8) - Fixing deprecated arrow `replace()` function with `shift()`.
- [FIX] Arrow upgrade to `0.15.2` to fix the above mentioned issues
- [FIX] Modifed `tests.py` to account for the timestamp change (tz is now `+0000`, instead of `-0000`)
- [FIX] replaced `ts = ts.replace(tzinfo=tz.gettz(timezone))` with `ts = ts.replace(tzinfo=timezone)` in `datemath.helpers.parseTime()` to fix [Issue 7](https://github.com/nickmaccarthy/python-datemath/issues/7)
added

- [NEW] Breakout of python2 and python3 requirements
- [NEW] Breakout of python2 and python3 specific CICD pipelines
- [NEW] Derecated the following python version (although they may still work, they are no longer supported) - `2.4`,`2.6`,`3.4`,`3.5`

** dont use this version **
* skipped due to name conflict on pypi, all changes are in `1.4.9`

fixed
- [FIX] Fixed timezone for date strings: [Issue 6](https://github.com/nickmaccarthy/python-datemath/issues/6)