Add MapSafe()
Merge pull request #2 from lytics/mapsafe

Add MapSafe()
Adding list type
add put to json test utils
new uid
fix non response for error http response
JsonHelper add a get Helpers list, Uid gen change epoch
NewJsonHelpers creates list from json body
move event vars to event
add string -> int coercion
adding new close int method
log level depth
Make json list public
add explicit log level calls
Support JsonHelper as native type
Add BoolSafe, also apparently some gofmt differences
Merge pull request #3 from lytics/boolsafe

Add BoolSafe, also apparently some gofmt differences
On assert fail, call Fatal() instead of Fail()