cleaning debug mode
reworked fetch, forced validation of downloaded ruby (if possible)
add sha512 validation, improved handling of checksums
improving rvm list
add detection of centos and gentoo
add arch detection
increase amount of remote rubies
add detection of arm platforms
remove spaces and slashes from deteted system identifiers
add binary/debian/wheezy_sid/armv6l/ruby-1.9.3-p194
Update Install requirements for JRuby in ArchLinux

jre and jdk package do not exist in ArchLinux anymore & would throw an error. 
 Instead, following packages are suggested:


* [jre7-openjdk](https://www.archlinux.org/packages/?name=jre7-openjdk)
* [jdk7-openjdk](https://www.archlinux.org/packages/?name=jdk7-openjdk)

This patch updates the package names to fix the error
Merge pull request #1083 from gaurish/patch-1

Update Install requirements for JRuby in ArchLinux
cleaning flags parsing in cli
Merge branch 'master' of github.com:wayneeseguin/rvm
add --verify-download
add gentoo builds, they use /usr/local/rvm :(
improve validation of download verification + improved logging
1.15.6
Merge pull request #1083 from gaurish/patch-1

Update Install requirements for JRuby in ArchLinux
Merge branch 'hotfix/1.15.6' into stable