Replace lrucache with Poco replacements.
- All Poco Replacements use std::shared_ptr rather than Poco::SharedPtr.
- This is temporary until Poco 2.0 is released and Poco::SharedPtr complies with c++11.
Cleanup cache.
Spacing / cleanup.
Added File IO.
Update file utils.
Add exceptions doc.
Update file io example.
Update fileio example.
Merge pull request #4 from bakercp/develop

Develop