Add support for multiple python engines for plugin.xml
Make plugin stdout immediately appear in Plugin window (set unbuffered)
Set launcher version for new release
Update ChangeLog.txt for coming release
Find the last occurence of xml header when skipping extraneous plugin output
Preparing for a new version of the Plugin Framework doc
New version of Sigil Plugin Framework doc
Strip redundant opf: prefix when parsing cotent.opf
Disconnect ManagePlugins menu to prevent multiple connections
Add full path to PluginRunner.h