highlights:

• support defer & panic
• support gc

features:

• defer & panic (#278 #279 #280 #283 #285 #286 #287 #288 #289 #290 #301 #302)
• gc & nogc (#284 #291 #292)
• llgo/ssa: typeAssert support interface (#272)
• llgo/ssa: interface equal (#298)
• cl: isVargs support defer/go (#299)
• build: build runtime local (#281 #282)
• libc compatible (#275 #276 #282)

changes:

• llgo/ssa: python.go (#274)
• cl: test decl only pkg kind (#297)
• build: llgo run should raise running errors (#294 #300)