ready for v1.2.1

theleague/commonmark 2.0.x compatibility matching

fix multiline indented code block rendering issue

fix escaping issue on indented code block

fix hr rendering error after list (#16)

update README

update plugin info

add force_commonmark option

Add link to info string and add example for clarity

prevent inline render inside <code>

fix footnote inside block

fix escape option in inline / block code

Fix default code block process issue

change italic toolbar button to more general markup

addd inline markdown markup buttons

update code

update README; compatibility

start to modify the toolbar; add doctype button

delete wrong case file

fix filename case

add table syntax

fix credit & typo

add strikethrough support

fix typo again

fix typo