v2.10.0
Fixed some file permissions (Cygwin loves adding execute)
Fixed #133: Thunderbird: raw HTML not rendering properly
Fixed #155: Make header auto-anchors optional. While doing that, also updated marked.js to chjj/marked@613bf6ac63e9a1e4071f4b304050dc084d6b3ccb. Need updated translations for new text.
Updated contribute info for translations. Fixed a test for Firefox.