data: database storage

* replaced storage by a new version that utilizes sqlite for persistence.
* added SqliteStorage to manage direct access to the database.
* added testsuit for sqlite.
* slimmed down the protected interface of the storage.
* changed tests in StorageTestSuit to avoid using protected methods of the storage.
* added functions to begin and commit a transaction to the storage.
* removed GraphFilterTestSuite.
* removed GraphFilterConductorTestSuite.
* added Node and Edge constructor that takes id as parameter
* added constructor for TokenComponentNameCached that accepts NameHierarchy as parameter
* added TokenLocation constructor that takes locationId as parameter.
* created respective construction functions in TokenLocatonLine, -File and -Collection.

fortune cookie message = Recognition will come from unexpected sources.

src/test/CxxParserTestSuite.h

@@ -2457,6 +2457,14 @@ private:
 	class TestParserClient: public ParserClient
 	{
 	public:
+		virtual void prepareParsingFile()
+		{
+		}
+
+		virtual void finishParsingFile()
+		{
+		}
+
 		virtual void onError(const ParseLocation& location, const std::string& message)
 		{
 			errors.push_back(addLocationSuffix(message, location));