Add bin/acorn to .gitignore
Add bin/acorn to .gitignore

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