adds search fxns for artist, release, recording with barebones mocha tests
adds search examples to README
adds search qry parameters thru filter hash
adds search filter hash to initial mocha tests
adds mocha devDependency, retabs entire file to single tab (eq to 4 spaces)
Revert "adds mocha devDependency, retabs entire file to single tab (eq to 4 spaces)"

This reverts commit 0576c67d20e24f037adec417bc2465ea09c35793.
ammend 0576c67 - adds mocha devDependency, retabs from spaces to 2 space tabs
Merge pull request #4 from alexanderscott/search-entities

Adds search functionality for Artist, Release, and Recording entities