Merge branch 'hotfix/1.25.30' into stable
Add MRI Ruby 2.1.3 and 2.0.0-p576.
Merge pull request #3042 from boone/new_rubies

Add MRI Ruby 2.1.3 and 2.0.0-p576.
remove older rubies and add checksums for new rubies, update #3042
1.25.31
Merge branch 'master' into hotfix/1.25.31
Merge branch 'hotfix/1.25.31'
apply ssl_no_ec2m.patch on all 1.8.7 rubies
fix selecting ruby for installing ree
do not remove archives folder when asking to remove archives on head ruby, fix #3048
do not use branch "v" when installing rbx head with no version set, fix #3049
trying to avoid possible set -e violations, update #3044
improve detection of missing dependencies of ruby libraries, fix #3051
add ssl_no_ec2m.patch to 1.9.2 installation
add ssl_no_ec2m.patch to 1.9.1
removing unused shell variables
remove the unused benchmark code
fixed typo
Merge pull request #3054 from messivanio/master

fixed typo
prevent hooks to break set -e, update #3044