Missed methods

* Added missed methods, changed version requirement to compatible release
* Decreased "requests" version for old python versions

bump version (#44)

Added GET store/offers method (#41)

Fix Base.parameters. Now they will refresh after making a requests

Missed methods, tests (#19)

Merge pull request #9 from gwinn/master

fix post methods bug

Merge pull request #6 from gwinn/master

Update package data for PyPi

Merge pull request #5 from gwinn/master

fix readme & setup.py

Merge pull request #2 from gwinn/master

Update for latest api, pip ready