add lr
fix check left recursion
fix PegString and PegCharacter
add pegClone
fix parsePegNode meoization
merge
merge
reduce left recursion
fix string bug
Merge pull request #12 from shun-honda/memoization

Memoization
Merge pull request #13 from nikuuchi/python

update python parser
add --profile argument. print memory usage, parse time
bugs fixed at typed
Merge pull request #14 from imasahiro/support_profile_mode

add --profile mode
Merge branch 'master' of github.com:libbun/libbun2
update bun grammar
refactoring PegParserContext
decuple ParserContext from implementation
bugs fixed
updated c.peg by ide version