Fix minor typo "fist" -> "first"
Fix minor typo "fist" -> "first"

 This closes #633

stevengill/cordova-docs,stevengill/cordova-docs,shazron/cordova-docs,purplecabbage/cordova-docs,shazron/cordova-docs,apache/cordova-docs,apache/cordova-docs,purplecabbage/cordova-docs,shazron/cordova-docs,apache/cordova-docs,stevengill/cordova-docs,stevengill/cordova-docs,purplecabbage/cordova-docs,tony--/cordova-docs,tony--/cordova-docs,purplecabbage/cordova-docs,apache/cordova-docs,tony--/cordova-docs,shazron/cordova-docs