----------------
- support for Measurement (Quantity +/- error).
- implemented buckingham pi theorem for dimensional analysis.
- support for temperature units and temperature difference units.
- parser can infers if the user mean temperature or temperature difference.
- support for derived dimensions (e.g. [speed] = [length] / [time]).
- refactored the code into multiple files.
- refactored code to isolate definitions and converters.
- refactored formatter out of UnitParser class.
- added tox and travis config files for CI.
- comprehensive NumPy testing including almost all ufuncs.
- full NumPy support (features is not longer experimental).
- fixed bug preventing from having independent registries.
(Issue 10, thanks bwanders)
- forces real division as default for Quantities.
(Issue 7, thanks dbrnz)
- improved default unit definition file.
(Issue 13, thanks r-barnes)
- smarter parser supporting spaces as multiplications and other nice features.
(Issue 13, thanks r-barnes)
- moved testsuite inside package.
- short forms of binary prefixes, more units and fix to less than comparison.
(Issue 20, thanks muggenhor)
- pint is now zip-safe
(Issue 23, thanks muggenhor)