changed iepy instance to be a python package
loading instance as a package, changed settings to be named just settings.py
separated things from rules core so it can be used from another parts
parsing features defined by the user. added rules wrapper
fixed tests for core rules
adapted example rules to the new paths
storing a reference to the instance on the iepy setup
added rules import on instance's init
loading rules from the instance reference on iepy
settings now detects instances with old settings file
instance upgrade changes settings files for older version
changed version to 0.9.2
added very basic testing
Merge branch '373-rules-features' into develop
versions tied together between iepy and docs
expanded if-clause of upgrader that was failing for 0.9 old versions
some more testing on custom features
Merge branch '373-test-custom-features' into develop
added documentation for using custom features
Merge branch '376-rules-as-features-documentation' into develop