sudo access for gem install

gem install needs root permission. Hence running gem install using sudo. For this to run successfully user 'go' needs to be added to sudoers list. This is mentioned in description.
update more-info link
Merge pull request #17 from jyotisingh/master

command repo review
Merge pull request #18 from jyotisingh/master

docs updated
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Merge pull request #19 from srinivasupadhya/master

docs update
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Added new keywords to 'vagrant up'. Also, renamed file so that it is consistent with other vagrant commands.
Added moreinfo to point to python.org.
cap deploy is now called 'capistrano deploy'. cap is still a keyword.
Made rsync command snippet not use bash. Changed description and keywords.
rsync ssh: Changed description and keywords.