Merge pull request #12 from ruboto/master

Follow the Ruboto convention of giving the activity class and file corresponding names
Follow ruboto convention when giving names to activities.
Update README.md

Readme now includes installation from Gemfile.apk
Bumped to version 0.0.4
Update README.md

Better formatting on installation instructions.
Update README.md

Deleted tabulation on code sample.
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Added bash commands for linux installation.
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Added install ruboto in installation.
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Added link to the wiki
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Added shot descriptions about the installation methods
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Corrected spelling mistake.
Update README.md

Updated alternate installation method. 
Added link to gosu web page.