Remove require('fs') from plugin.spec.js
Remove require('fs') from plugin.spec.js

 This closes #501

filmaj/cordova-lib,AxelNennker/cordova-lib,shazron/cordova-lib,filmaj/cordova-lib,apache/cordova-lib,shazron/cordova-lib,matrosov-nikita/cordova-lib,ktop/cordova-lib,purplecabbage/cordova-lib,dpogue/cordova-lib,matrosov-nikita/cordova-lib,ktop/cordova-lib,phonegap-build/cordova-lib,matrosov-nikita/cordova-lib,stevengill/cordova-lib,stevengill/cordova-lib,matrosov-nikita/cordova-lib,purplecabbage/cordova-lib,ktop/cordova-lib,AxelNennker/cordova-lib,purplecabbage/cordova-lib,matrosov-nikita/cordova-lib,purplecabbage/cordova-lib,shazron/cordova-lib,stevengill/cordova-lib,phonegap-build/cordova-lib,stevengill/cordova-lib,AxelNennker/cordova-lib,ktop/cordova-lib,dpogue/cordova-lib,dpogue/cordova-lib,AxelNennker/cordova-lib,apache/cordova-lib,phonegap-build/cordova-lib,dpogue/cordova-lib,apache/cordova-lib,phonegap-build/cordova-lib,filmaj/cordova-lib,shazron/cordova-lib,shazron/cordova-lib,apache/cordova-lib,purplecabbage/cordova-lib,dpogue/cordova-lib,filmaj/cordova-lib,stevengill/cordova-lib,matrosov-nikita/cordova-lib,AxelNennker/cordova-lib,AxelNennker/cordova-lib,purplecabbage/cordova-lib,phonegap-build/cordova-lib,shazron/cordova-lib,ktop/cordova-lib,ktop/cordova-lib,filmaj/cordova-lib,phonegap-build/cordova-lib,dpogue/cordova-lib,apache/cordova-lib,AxelNennker/cordova-lib,stevengill/cordova-lib,filmaj/cordova-lib