Figure out how to get the spirit parsers to report parse errors

[diane]

The annotation parser and the motif parser are now both using the spirit parse framework which has some advantages in allowing more complicated grammers.

Unfortunately my current code doesn't have an error checking so parse errors are just ignored.

[diane]

[403] fixes this. Admittedly my count variable in my functor structs to keep track which entry we failed parsing on is perhaps not the cleanest solution. But at least it gives a hint where things break.