do not try to install custom packages when the list is empty, fix #2163
redefine __rvm_which to be early evaluated - should speed up PATH cleaning which is used wuite offten
use full command for help in autocomplete code for Zsh when checking gemset subcommands, fix #2141
formating code for functions generating, add error for missing which
warnings should be printed to stderr, fix #2171
add sbin paths to PATH when sudo, update #2166
use www.dnsbalance.ring.gr.jp
Merge pull request #2170 from Ch00k/master

Improve support for different Solaris flavors
Merge pull request #2136 from hsbt/use-ring-mirror

use www.dnsbalance.ring.gr.jp
fix the Zsh warning message to display proper version and the found binary, fix #2158
Merge branch 'master' of github.com:wayneeseguin/rvm
Beautifying code
Merge upstream