Broken code commit - attempt flatfile data filtering
Update generated_flatfile to allow parameter based step

Default to 1 if no value
Change travis.yml setting for testing
Correct flatfile datafiltering logic.

Use of NaN may not be the best method, but it's more valid then 0 data, and
less intensive than generating linear interpolation.
Ignore all generated flatfiles
Create a Backend class function "live?"

Denotes if interval based updates can be assumed to work. False for flatfiles,
true unless otherwise overloaded
Change gon variable to use metric hash

Change from gon.metric and gon.feed to gon.metrics as an object of multiple
values. Change stacked and standard js files accordingly
Change horizon.js to suit new gon variable format
update .gitignore - ignore all public/flatfile*.csv
Merge pull request #3 from anchor/flatfile_cleanup

Fix flatfile logic and autoupdating