[FEAT] Added loadRewards() and redeemRewards() methods. Bunch of code cleanups.
[FEAT] Added loadRewards() and redeemRewards() methods. Bunch of code cleanups.

BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK,BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK