Split Trace.Hpc.Combine into three modules

app/Main.hs

hpc-bin.cabal

src/HpcCombine.hs

src/Trace/Hpc/Combine.hs

src/Trace/Hpc/Draft.hs

src/Trace/Hpc/Flags.hs

src/Trace/Hpc/Lexer.hs

src/Trace/Hpc/Main.hs

src/Trace/Hpc/Map.hs

src/Trace/Hpc/Markup.hs

src/Trace/Hpc/Overlay.hs

src/Trace/Hpc/Parser.y

src/Trace/Hpc/Plugin.hs

src/Trace/Hpc/Report.hs

src/Trace/Hpc/ShowTix.hs

src/Trace/Hpc/Sum.hs

src/Trace/Hpc/Utils.hs