read topic types from plugin xml
removed getTopicTypes / checkTopic from Display interface
added message type metainfo to plugin_description.xml
Merge branch 'hydro-devel' of github.com:dgossow/rviz into hydro-devel
Merge branch 'hydro-devel' of github.com:ros-visualization/rviz into hydro-devel
removed getTopicTypes from ImageDisplayBase
enabled add by topic for interactive markers
DisplayFactory::getTopicTypes: stop when xml elem found
DisplayFactory::getTopicTypes: fixed doc
DisplayFactory: caching topic types to avoid parsing the plugin xml multiple times
DisplayFactory: renamed getTopicTypes to getMessageTypes
added tinyxml dependency
DisplayFactory: renamed topic_type_cache -> message_..
Update plugin_description.xml
Merge pull request #686 from dgossow/hydro-devel

Get supported message types from plugin xml file