Added entity initializers for HttpRequestSensors. Polling over a URI and retrieving a single JSON value from the response.
Fix deprecated calls on "chain" to "Functionals.chain"
Fixed commented code and unused imports
Changed asserts to static imports
Fixed variable names to fit standard notation
Add support for json-path (https://code.google.com/p/json-path) for full access to json response
Moved test to new package
Refactoring to avoid removing functionality:
now it supports both full path with JSONPath (through HttpValueFunctions.jsonContentsFromPath) and 1-level json element only.
Merge pull request #3 from mbarrientos/http-request-sensors

Added Http request sensors entity-initializers for YAML definition