Added npm clean script (ref ghaiklor/generator-sails-rest-api#50)
Added npm clean script (ref ghaiklor/generator-sails-rest-api#50)

tnunes/generator-trails,eithewliter5518/generator-sails-rest-api,synergycns/generator-sails-rest-api,ghaiklor/generator-sails-rest-api,italoag/generator-sails-rest-api,IncoCode/generator-sails-rest-api,jaumard/generator-trails,italoag/generator-sails-rest-api,ghaiklor/generator-sails-rest-api,mhipo1364/generator-sails-rest-api,konstantinzolotarev/generator-trails