Expanded on examples on Readme
Added promotion and convertion rules and  function; cleaned up the code
RoundToNearest is now imported from gmpy2
Fixes in __pow__ and added corresponding tests
Small changes in Realme.md
Correction on the implementation of tan
Added tests (julia)
Small correction on the implementation of tan (python)
Corrected and enlarged tests (python); made them compatible with julia version
Add a test for tan, which i simply forgot to commit
Merge pull request #1 from lbenet/master

Scattered corrections and improvements, and tests for python and julia versions