Updated the Decoda projectfile to contain all current files.
Rewritten the WebAdmin Plugins tab from scratch.

The tab now displays 3 lists of plugins - Loaded, Error and Disabled. The changes are saved into settings.ini directly, but the server doesn't reload until instructed specifically by the user. Loaded plugins may be moved up and down easily.
More visible reload warning.
Added a general description of how the Plugins tab works.
Merge pull request #45 from mc-server/PluginTabRewrite

Plugin tab rewrite