Added cursor-helpers and new find method;
updated docs; additional buffertime for timeout.
added cursor namespaces, cleanups;

refactored helpers for DBCursor into own namespace;
cleaned up previous hacks;
added extra classes for add-options;
added tests for cursor namespace;
cleanups; updated query/option;
Merge pull request #62 from timgluz/query_options

Enhancements for tweaking options of dbCursor