[vim mode] Don't enable tern for nofile/nowrite buffers
[vim mode] Don't enable tern for nofile/nowrite buffers

Issue #72

mcanthony/tern,kylehg/tern,fileability/tern,mcanthony/tern,dorellang/tern,rustemferreira/tern,ternjs/tern,angelozerr/tern,Icenium/tern,albertinad/tern,Icenium/tern,anandthakker/tern,neoclide/tern,marijnh/tern,talyian/tern,sergeche/tern,marijnh/tern,forivall/tern,MarcelGerber/tern,marijnh/tern,emallson/tern,albertinad/tern,talyian/tern,ternjs/tern,othree/tern,Icenium/tern,adrianton3/tern,jgiles/tern,vegansk/tern,OliverJAsh/tern,messfairy/tern,eranif/tern,cdosborn/tern,mcanthony/tern,pombredanne/tern,eranif/tern,MarcelGerber/tern,kentdoppelganger/tern,ypresto/tern,messfairy/tern,neoclide/tern,fileability/tern,dorellang/tern,emallson/tern,albertinad/tern,anandthakker/tern,jgiles/tern,talyian/tern,cloud9ide/tern,rustemferreira/tern,magnars/tern,jgiles/tern,jason0x43/tern,neoclide/tern,angelozerr/tern,ryanstewart/tern,dorellang/tern,messfairy/tern,inafact/tern,fileability/tern,emacsmirror/tern,emacsmirror/tern,emacsmirror/tern,cdosborn/tern,othree/tern,emallson/tern,jeffslofish/tern,ternjs/tern,MarcelGerber/tern,aklt/tern,adrianton3/tern,rustemferreira/tern,cloud9ide/tern,anandthakker/tern,eranif/tern,purcell/tern,othree/tern,cdosborn/tern,adrianton3/tern,sqs/tern