Add new extension .tsx for TypeScript
Add new extension .tsx for TypeScript

TypeScript 1.6 has introduced a new .tsx file extension.
sebgod/linguist,jrnold/linguist,MahmoudFayed/linguist,github/linguist,c-lipka/linguist,yyx990803/linguist,erkyrath/linguist,meunierfrederic/octocatlinguist,sebgod/linguist,stanhu/linguist,pchaigno/linguist,erkyrath/linguist,mwpastore/linguist,MostAwesomeDude/linguist,christop/linguist,github/linguist,github/linguist,sebgod/linguist,meunierfrederic/octocatlinguist,github/linguist,c-lipka/linguist,mwpastore/linguist,R4PaSs/linguist,jtbandes/linguist,yyx990803/linguist,stanhu/linguist,JJ/linguist,Mx7f/linguist,ppaulweber/github-linguist,tschf/linguist,jrnold/linguist,christop/linguist,davidzchen/linguist,yyx990803/linguist,pchaigno/linguist,steventhanna/linguist,davidzchen/linguist,ppaulweber/github-linguist,jtbandes/linguist,meunierfrederic/octocatlinguist,JJ/linguist,osorgin/linguist,Mx7f/linguist,JJ/linguist,pchaigno/linguist,PsichiX/linguist,MostAwesomeDude/linguist,R4PaSs/linguist,MahmoudFayed/linguist,erkyrath/linguist,erkyrath/linguist,sebgod/linguist,JJ/linguist,tschf/linguist,PsichiX/linguist,stanhu/linguist,yyx990803/linguist,osorgin/linguist,steventhanna/linguist,stanhu/linguist,pchaigno/linguist