add hash function

Signed-off-by: xiehuc <xiehuc@gmail.com>
add with libev optional

Signed-off-by: xiehuc <xiehuc@gmail.com>
0.2a release

Signed-off-by: xiehuc <xiehuc@gmail.com>
simplify hooks
delete cmake extra flags
Merge branch 'upstream-preview' into preview
Merge branch 'debian' into preview