Merge pull request #3 from bootstraponline/master

Update documentation
Add alert documentation
Add alert command
Add execute_script
Update readme
Move to lib
Fix alert
App.zip works
Update readme.md
Add EMFILE work around
Add webdriver alert methods.
Add e_button
Add alert button example

https://github.com/appium/appium/issues/161#issuecomment-13446511
Add issue number
Update readme.md
Document e_button
Update readme.md
Add alert documentation
Add alert methods
Fix size check
Remove old alert docs