Each subsequent rule was reusing variables object, which wasn't good.
Parsing of sequences had to be changed not to end with semi,
and it wasn't actually passing on lexicons in the first place.

Removed corpus2 wrappers from wccl wrappers  (wccl includes corpus2 wrappers from /usr/share/swig1.3/libcorpus)

fix wccl-match and wccl-rules to use the ann reader option instead of manually wrapping sentences with annotatedsentences

It was looking for minimum value and Position::Nowhere is
the smallest you can get value-wise (min_int). So if there was
an empty Match in a vector, first_token for the vector would
always end up returning Position::Nowhere, which was wrong
(empty submatches should've been ignored and Position::Nowhere
returned only if there were no non-empty alternatives).