v2.0 base on regex101.com v2

This version is base on regex101.com v2，it can save your regex and share it to your friends.
Thanks for @tutufeier fixed css.

v1.0 base on regex101.com v1

This version is base on regex101.com v1, and it can not save because regex101 is upgrade to v2 and changed the save api. But it can use for the regex test as usual.