Update git-submodule-strategy.rb

Prevent errors with filenames that have single quote. See: http://www.ducea.com/2007/11/22/xargs-unmatched-single-quote/
Update capistrano-git-submodule-strategy.gemspec
Fix syntax error in string
unescape newline literal
Merge pull request #6 from Tails/patch-1

Prevent errors with filenames that have single quote