add filterlim rules for eventually monotone bijective functions; mirror rules for at_top, at_bot; apply them to prove convergence of arctan at infinity and tan at pi/2

merged

emit bulk edits on initialization of multiple buffers, which greatly improves performance when starting big sessions (e.g. JinjaThreads);

go back to Z3 3.2

tuned defs of sec_xyz

provide general insert_line_padding as convenience operation, e.g. for BeanShell macros;

simplify MaSh term patterns + add missing global facts if there aren't too many

MaSh improvements: deeper patterns + more respect for chained facts

tuned names

tweaked MaSh exporter