[lit] Rewrite TODO list, and elaborate on some things.
[lit] Rewrite TODO list, and elaborate on some things.

 - If anyone is interested in lit's feature set, I'd appreciate any comments on
   the elaborated items.

git-svn-id: a4a6f32337ebd29ad4763b423022f00f68d1c7b7@188590 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx