Start of fitness tree
Added remove and choose functions
added probabalistic tests
changed default tests to not include prob tests
modified moran to use fitness tree and added tests
added gitignore to ignore compilation artifacts
Fixed Division by zero bug
pep8 compilance
Removed overzelous cleaning
Adding scripts to run on AWS
Fixing inner_run to run instances
Update to number of replicates counter
Merge remote-tracking branch 'joe/master'
changed import line to fix run_config
Changing Struc Pop to do migrations not swap
Made Structured Populations perform migrations
Renamed structured pop to meta pop

To allow for structued pop to refer to grid of
local migrations

meta pop now means unstructued (global migrations)
scratch function for local migration