data: increased project load and codeview performance

* rewrote searchnode to use map
* added local cache for parent node ids when creating the Hierarchy Cache.
* added indices to SqliteStorage to increase code view performance.

src/lib/data/SqliteIndex.h

@@ -0,0 +1,21 @@
+#ifndef SQLITE_INDEX_H
+#define SQLITE_INDEX_H
+
+#include <string>
+#include "sqlite/CppSQLite3.h"
+
+class SqliteIndex
+{
+public:
+	SqliteIndex(const std::string& indexName, const std::string& indexTarget);
+	~SqliteIndex();
+
+	void createOnDatabase(CppSQLite3DB& database);
+	void removeFromDatabase(CppSQLite3DB& database);
+
+private:
+	std::string m_indexName;
+	std::string m_indexTarget;
+};
+
+#endif // SQLITE_INDEX_H