Merge pull request #35 from waldyr/master

Entries of Imagemagick in the README and in main script
Bump Ruby 2.0.0 to 2.0.0-p195
Update railsready.sh
add option for rbenv
Bump Ruby 2.0.0-p195 to Ruby 2.0.0-p247
Merge pull request #38 from elevation/master

Bump ruby 2.0.0 to p247
Merge pull request #36 from rafeequl/master

Add option for rbenv
Update railsready.sh
Update railsready.sh
Bump ruby patch level
Update Ruby to version 2.1.0
Update README.md
Update railsready.sh
Update README.md
Replace '$MACHTYPE' with '$system_os' to enhance grepping os type.
Merge pull request #41 from melvkim/master

Replace '$MACHTYPE' with '$system_os' to enhance grepping os type.
updating homebrew installation source
automating user input required in homebrew installation
Since CentOS 6.5 doesn't contain the string centos in /etc/issues, I added the check for /etc/redhat-release
Removed the brackets