simple compiler. err at begin and end of functions
modify parser.y
Merge branch 'shining' of https://github.com/wqfish/avl into shining

Conflicts:
	src/parser.y
Merge branch 'shining'

Conflicts:
	sample_code/sorting.cpp
Merge branch 'master' of https://github.com/wqfish/avl

Conflicts:
	sample_code/sorting.cpp
	src/Makefile.am