Merge branch 'hotfix/1.25.22'
specify @global as GEM_HOME when installing rubygems, fix #2724
ruby-2.1.0+ should work just fine with gcc on osx-10.9+, fix #2695
add --extensions flag for gem pristine on new rubygems, fix #2684
update tests to be faster, update #2735
update tests for osx
update tests for osx
improved __rvm_env_string
update tests for osx
ruby 1.8.7 requires older rake
remove question and answer
extract prepare action to separate file, update #2730
rename external script to mount to match cli
make scripts/prepare executable
remove unnecessary wrapping function __rvm_run_script
Update patchsets for Scientific support
Merge pull request #2737 from joshua-rutherford/master

Update patchsets for Scientific support
File.exists? is deprecated
Merge pull request #2738 from deivid-rodriguez/patch-1

File.exists? is deprecated
fix _prisitne_command, update ec5e102990bcbdf5d541fdf164d22dfb99684aec, update #2684