logic: Show overview of analyzed symbols after launch

* show analysed nodes as bundles in graph
* ellide node names longer than 50 chars
* sort nodes alphabetic in these bundles
* show stats of analysis in code
* error are displayed as well in overview
* added keywords overview and error
* project description can be set in .coatiproject file
* description can include links to symbols using [symbol] syntax
* updated documentation
* increased toc nesting in documentation

src/lib/settings/ProjectSettings.cpp

@@ -122,3 +122,8 @@ bool ProjectSettings::setSourceExtensions(const std::vector<std::string> &source
 {
 	return setValues("source/extensions/source_extensions", sourceExtensions);
 }
+
+std::string ProjectSettings::getDescription() const
+{
+	return getValue<std::string>("info/description", "");
+}

src/lib/settings/ProjectSettings.h

@@ -18,6 +18,9 @@ public:
 
 	virtual void save(const FilePath& filePath);
 
+	// info
+	std::string getDescription() const;
+
 	// language settings
 	std::string getLanguage() const;
 	bool setLanguage(const std::string& language);