Add readme for loose parser plugins
Add readme for loose parser plugins

Rich-Harris/acorn,ajaxorg/acorn,MarcelGerber/acorn,Rich-Harris/acorn,happibum/acorn,ternjs/acorn,marijnh/acorn,mysticatea/acorn,ternjs/acorn,mysticatea/acorn,MarcelGerber/acorn,btmills/acorn,TimothyGu/acorn,marijnh/acorn,mathiasbynens/acorn,ajaxorg/acorn,mysticatea/acorn,Rich-Harris/acorn,marijnh/acorn,TimothyGu/acorn,mathiasbynens/acorn,MarcelGerber/acorn,btmills/acorn,btmills/acorn,ternjs/acorn,TimothyGu/acorn,happibum/acorn,ajaxorg/acorn,happibum/acorn,mathiasbynens/acorn