move build process to rvm
just update rvm on travis
add explicit rvm reload
rvm autolibs smf
reorganize travis code, add showing last log on failure
add creation of /etc/openssl for mpapis so openssl compiles properly
quote before_script with colon to not be interpreted as hash
Merge pull request #10 from tokaido/features/use_rvm

use rvm for buiding binary ruby