Uniformization of identation using Ruby's default

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Fix README reference to Package constant

Include Bcash module information.
Fix README reference to PAD constant
Use submit_tag in example of submit button overwrite

The content_tag helper could be used to generate a <button>, but it is
better to use the input[type="submit"] tag.
Use ERB as template engine of form html file

This will remove the dependency of haml.
Uniformize use of Hash syntax

Since the new (from Ruby 1.9.3) it's already used in specs and some lib
files, use it abroad the project.
Fix README structure and ajust some text
Fix typo on README
Merge pull request #1 from hugomaiavieira/patch-1

Fix README structure and ajust some text
remove missing haml require
Merge pull request #2 from hugomaiavieira/code-cleanup

remove missing haml require
Merge pull request #1 from Codeminer42/code-cleanup

Code cleanup