ENH: Implement a Lake class
TST: Test for the Lake class
TST: Files for the Lake class unit test
ENH: Add to the ILake interface
BLD: Add shapely and fiona dependencies to __init__.py
Merge pull request #3 from twdb/feature/lake

Implement a Lake class
Add basic survey importer.  Not working, but framework is coming together.
Merge branch 'master' into feature/tasks-framework
Enough changes to get a blank UI up.