Added TODOs and FIXMEs for Delaborate.hs
Added FIXME from Chaser.hs.
Added TODOs for Unlit.hs
Added TODOs for ParseHelpers.hs
Added FIXME for DumbBc.hs
Added TODOs from ParseData.hs and remove redundant comments.

+ There was a mention of `forcenames`, this doesn't exist anymore and was removed.
Added TODO for DataOpts.hs
Merge pull request #1598 from jfdm/tidyup/lift-todos-2

Second lift of TODOs and FIXMEs from Idris source.