parse         -> parse_infix_psl
parse_lbt     -> parse_prefix_ltl
parse_sere    -> parse_infix_sere
parse_boolean -> parse_infix_boolean

Fixes #87.

* src/ltlparse/ltlparse.yy, src/ltlparse/public.hh:
Do the above changes.
* doc/mainpage.dox, doc/org/tut01.org, iface/ltsmin/modelcheck.cc,
src/bin/common_finput.cc, src/hoaparse/hoaparse.yy,
src/kripkeparse/kripkeparse.yy, src/tests/checkpsl.cc,
src/tests/checkta.cc, src/tests/complementation.cc,
src/tests/consterm.cc, src/tests/emptchk.cc, src/tests/equalsf.cc,
src/tests/kind.cc, src/tests/length.cc, src/tests/ltl2tgba.cc,
src/tests/ltlprod.cc, src/tests/ltlrel.cc, src/tests/randtgba.cc,
src/tests/readltl.cc, src/tests/reduc.cc, src/tests/syntimpl.cc,
src/tests/tostring.cc, wrap/python/ajax/spot.in,
wrap/python/tests/alarm.py, wrap/python/tests/interdep.py,
wrap/python/tests/ltl2tgba.py, wrap/python/tests/ltlparse.py: Adjust.