EventuallySemigroup, etc
fixes
swap L and R in Eventually structures
add license header
EventuallyMonoid just needs Semigroup[L]
Merge branch 'release/0.1.7' into develop
bump to 0.1.8-SNAPSHOT
test
multi module testing support.
unit tests for Eventually
Merge pull request #103 from asiegel34/eventually

EventuallySemigroup, etc
remove mixin pattern and split extra files
Merge branch 'develop' into feature/multi_module
add eventually
Merge pull request #109 from twitter/feature/multi_module

Algebird-Testing and multi-module support
publish aggregate.
bump to version
Merge branch 'release/0.1.8'
version in readme.