parsing: read dos line endings, deprecate encoding compatibility layer
We should now read all text in universal newline mode, so eg journal
files with DOS/windows line endings are fine.

This also deprecates and disables our IO encoding compatibility layer,
which prevented many encoding-related problems with certain platforms
and GHC versions. With modern GHC (7.x) this is now hopefully totally
unnecessary, but the module remains in place just in case.