some refactor, using base64#2

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jshou wants to merge 5 commits intochrislim:masterfrom

Commits on May 11, 2011

set onclick in main.xml, refactored CipherTxtMain accordingly
jshou
committed

Commits on Jun 15, 2011

using Base64 so that there aren't illegal UTF-8 byte sequences in text, eliminating need for surrounding parens
jshou
committed

Commits on Jun 17, 2011

turned off debugging for initial release, new icons
jshou
committed

Commits on Mar 25, 2012