file/line info passed to codegen; argument type of mrb_generate_code() has changed
ci->nregs should be set to irep->nregs + 2 if proc is not a C function.
Publish mrb_hash_delete_key.
Merge pull request #440 from masamitsu-murase/request_publish_mrb_hash_delete_key

Publish mrb_hash_delete_key.
Merge pull request #439 from masamitsu-murase/modify_ci_nregs_in_yield

ci->nregs for ruby proc.
Set filename in mrbc.c.
Merge pull request #441 from masamitsu-murase/set_filename_in_mrbc

Set filename in mrbc.c.
free symbol table from mrb_close()
close pool in toplevel scope
free heap pages from mrb_close()
fixed typos
Merge pull request #442 from kimhmadsen/master

fixed typos
remove flags from irep
inline fixnum ops
save debugging lineno info in irep
source position added to exception representation
wrong condition for iv name check
manage line number in yacc rules, not in lexer
peephole optimization to generatio OP_ADDI/OP_SUBI
introduce toplevel object main; close #327