add test math
bug fixed matchCharset and add LeftJoinObject
fixed NODE_dump
check out-of-index
do not increment a posion of input_source in NODE_SetTag
rename NODE_GetConsumeText() => NODE_GetText()
Merge pull request #11 from imasahiro/bugfix

bug fix
allocate call_stack and stack into heap
add test/test_util.h
change ParserContext_ParseFiles API. remove const from 3rd argument
refactor NODE api
remove stringbuilder
fix build error
remove unused memory allocation
cleanup code
bug fixed in testcase
Merge pull request #12 from imasahiro/fix_pegvm_api

Fix pegvm api
revert input's pos when pattern/text match is failed
Merge pull request #15 from imasahiro/revert_input_pos_when_failed

Revert input's pos when pattern/text match is failed
replace malloc and realloc