drop libreadline dependency. Use libedit instead.
update readme
link to readthedocs
move 'compliance' section to lang.rst
missing footer line
dynamically allocate GC arena
automatic arena extend
declare arena_idx as a size_t
Merge branch 'auto-arena-extend'
allow `else` and `=>` keyword in `case`
if `=>` is specified, treat expression as a function
fix analyze errer for (+) and (*)
Merge pull request #116 from KeenS/addmul-arity

Fix analyze errer for (+) and (*)
Merge pull request #115 from KeenS/case-else

allow `else` and `=>` keyword in `case`
resolve confrict