bstrlib - WIP - tested functions biseqcaseless
bstrlib - WIP - tested functions bgets and breads
bstrlib - WIP - tested functions bltrimws, brtrimws and btrimws
bstrlib - WIP - tested functions bassignmidstr
bstrlib - WIP - tested functions bmid2tbstr
bstrlib - WIP - tested functions btrunc
bstrlib - WIP - tested functions btfromblktrim
bstrlib - WIP - tested functions bassigncstr