change original sentence color for highlighting, with TDD
add span to highlight individual word
unhighlight typed word
WIP shift words being typed
updateing branch

rge branch 'master' into user_feedback

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WIP: connect all functionality and refactoring, bug with past_text
game logic and interface functioning from start to finish
Merge pull request #10 from tiger-swallowtails-2013/user_feedback

User feedback