fix warn on install for asking https
installing nokogiri
Merge pull request #32 from twillouer/master

Little change for ubuntu installers - thanks William.
Create LICENSE.md
Updates dependencies
Removes rspec deprecation stub => double
Updates ruby version in readme
Moves from .rvmrc to .ruby-version

Note from RVM:
You are using '.rvmrc', it requires trusting, it is slower and it is not
compatible with other ruby managers, you can switch to '.ruby-version'
using 'rvm rvmrc to [.]ruby-version' or ignore this warning with 'rvm
rvmrc warning ignore /Users/duksis/code/extreme_startup/.rvmrc',
'.rvmrc' will continue to be the default project file in RVM 1 and
RVM 2, to ignore the warning for all files run 'rvm rvmrc warning ignore
all.rvmrcs'.
Merge pull request #33 from duksis/dependencies

Updates outdated dependencies - thanks Hugo.
Add Mac install instructions for Xcode 5.1 and following.
Added clarifying note about WAMRUP argument.
Added placeholder text to remind players to provide URL scheme when registering.
Remove superfluous brackets from README markdown.
Merge pull request #34 from peterwestmacott/master

Added Xcode 5.1+ install instructions.