Fixed mkspec to not create spec stubs for private methods.
Fixed mkspec to not create spec stubs for private methods.

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