Add a first prototype for an IDEA plugin that fixes Quick Doc (Ctrl-Q) in projects using pegdown-doclet.
Merge branch 'master' into idea-plugin
First working version of the IDEA plugin.
Add support for PlantUML diagrams and images to IDEA plugin, introduce a factory method for customising the Serializer, fix formatting problems caused by leading spaces and asterisks.
Add change notes to plugin.xml.
Merge remote-tracking branch 'origin/master' into idea-plugin
Keep the rendering options button for the project enabled, even if Pegdown is disabled for the project.

This enables the user to select "Enabled" for single modules and change the rendering options globally.
Implement RenderingOptions.applyTo(), add docs for IDEA plugin.