solidify had a limit imposed on how far vertices could move which didnt work well, removed (the modifier doesnt do this).
also missed freeing 2 arrays.
* name bmesh operator func's BMO_slot_buffer_* rather then BMO_slot_* since it wasnt obvious some only dealt with buffer, some both.
* more typechecks and asserts of BMO_ functions (I lost some time calling a map with a buffer function that failed silently).
* small speedup for extrude check - test if the edge is wire _before_ doign a hash lookup.
* add extra argument to BMO_slot_map_to_flag() to filter by vert/edge/face
* made BMO_slot_map_* / BMO_slot_buffer_* functions stricter with type checking.
* added BM_elem_flag_set, BMO_elem_flag_set. to avoid 'if(...) enable(); else disable();' all over the place.
* added bmesh_operator_api_inline.c, the header file was getting messy.