use load stream as designed
cosmetics
update docs
update sequence ontology files to version 2.5.1
add scaffold for part-of type checking
coding style
put GtOBOStanza into separate file
obo parse tree: allow multiple values for single tag
basic version of part-of checking finished
cache results of part-of checking
use correct size
part-of typechecking: match integral_part_of relationships
allow to compile with assert=no
nameing conventions for GtDynBittab
move GtBoolMatrix to core
part-of typechecking: use symbol
fix bug in GtBoolMatrix code
extend GtDynBittab class
extend GtBoolMatrix class
part-of typechecking: separaete is_a edge list from part_of list