Ignore json folder

This fixes the filenames causing sync errors in windows
replace workerUnit with workerunit
Merge branch 'dev' of https://github.com/laroyo/CrowdTruth into dev
send format and domain for workerunit
updated script to update units and updated annotation vector for events-DIVE
solved bug on creating annotation vectors
annotation vector
workerunit update
Deleted json files
Merge branch 'dev' of https://github.com/laroyo/CrowdTruth into dev
Code snippet examples
workerunits 2
Merge branch 'dev' of https://github.com/laroyo/CrowdTruth into dev
workerunits 3
workerunit 4
save new crowd agents
added template for metrics
crowd agent
catch exception workerunit
New text preprocessors

Added string length and term difference preprocessor functions.