Some updates for README.
Some updates for README.

kachick/mspec,rdp/mspec,MagLev/mspec,eregon/mspec,ryoqun/mspec,elia/mspec,btakita/mspec,shugo/mspec,jflam/mspec,iainbeeston/mspec,yugui/mspec,ruby/mspec,mkb/mspec,nobu/mspec,rubinius/mspec,alex/mspec,MagLev/mspec,ryoqun/mspec,iainbeeston/mspec,voxik/mspec,mrkn/mspec,kachick/mspec,shirosaki/mspec,ruby/mspec,Zoxc/mspec,Gibheer/mspec,opal/mspec,opal/mspec,timfel/mspec