Optimized the datastructure of the transaction by a LOT
Optimized the datastructure with Hashmaps and arraylists
Merge branch 'optimize' of https://github.com/monkeyCee/UWallet into optimize

Conflicts:
	UWallet/bin/UWallet.apk
	UWallet/bin/classes.dex
	UWallet/bin/classes/com/enghack/uwallet/MainActivity.class
	UWallet/bin/resources.ap_
	UWallet/src/com/enghack/uwallet/MainActivity.java
fixed merge conflicts