started converting to use optparse-applicative

This is a work in progress. It compiles and is able to do basic command
dispatch, including git autocorrection, while using optparse-applicative
for the core commandline parsing.

* Many commands are temporarily disabled before conversion.
* Options are not wired in yet.
* cmdnorepo actions don't work yet.

Also, removed the [Command] list, which was only used in one place.

Command/Log.hs

@@ -38,9 +38,9 @@ data RefChange = RefChange
 
 type Outputter = Bool -> POSIXTime -> [UUID] -> Annex ()
 
-cmd :: [Command]
-cmd = [withOptions options $
-	command "log" paramPaths seek SectionQuery "shows location log"]
+cmd :: Command
+cmd = withOptions options $
+	command "log" paramPaths seek SectionQuery "shows location log"
 
 options :: [Option]
 options = passthruOptions ++ [gourceOption] ++ annexedMatchingOptions