TEST sets up jest unit testing template

[kchia]

TEST adds client and server spec files to ./test

TEST renames test folder and adds jest cli to package.json

TEST adds test to package.json scripts

TEST adds template to spec files

TEST modifies package.json to enable JSX transforms

TEST adds preprocessor.js

FIX fixes linting errors in preprocessor.js

FIX fixes jest file path on scripts property in package.json

TEST comments out test script in package.json to disable testing

FIX removes test script from package.json