corrected readme
Merge pull request #5 from mmoghadas/update_readme

corrected readme
Including "wait" gem to implement wait_for semantics.
Cleaned up command api to return Command objects instead of hashes.
Updated README.md
Version bump
Modified to make pry integration easier, using static methos instead of
member methods.
Version bump.
Use include.
Added simple comments, fixed some stylistic issues (spacing,
single-quoted strings, etc).
More stylistic fixes.