Upgrades rubygems for 1.9.1: 1.3.5 -> 1.3.7
Autoclean on unsuccessful installation
fix: Ensure cleaned directory did not exist
Merge pull request #275 from sheerun/failure-cleanup

Autoclean on unsuccessful installation
Added a definition for 2.0.0-p0
switched http
Merge pull request #299 from hsbt/add-definition-200p0

Added a definition for 2.0.0-p0
ruby-build 20130224
fix exit status of install with verbose
Rename the CAfile to cert.pem since that's the hardcoded default.

$ strings ~/.rbenv/versions/2.0.0-rc2/openssl/lib/libcrypto.a |
  grep -B3 SSL_CERT_FILE
/Users/jeremy/.rbenv/versions/2.0.0-rc2/openssl/ssl/certs
/Users/jeremy/.rbenv/versions/2.0.0-rc2/openssl/ssl/cert.pem
SSL_CERT_DIR
SSL_CERT_FILE
No need to rehash when using CAfile. Used for file-per-cert CApath hashing.
bump versions to 2.1.0
Merge pull request #313 from hsbt/bump-versions-210

bump versions to 2.1.0
Merge pull request #310 from znz/fix-exit-status-of-install-with-verbose

fix exit status of install with verbose
ruby-build 20130225
Build a shared openssl to link to Ruby as a stopgap to fix build issues some people are having, pending understanding why static linking isn't working.
ruby-build 20130226
Default Ruby CFLAGS to `-Wno-error=shorten-64-to-32`; don't set `CC`

Ref. #290, #311
Feature detection for `-Wno-error=shorten-64-to-32`
Merge pull request #252 from jessedearing/upgrade_191_rubygems

Upgrades rubygems for 1.9.1: 1.3.5 -> 1.3.7