Update README features

o Add unicode note
o Add get/info functions
Add attribute tid, and to_hash method
Fix cache directory add optional json serialization
Add utf8 encoding to cli.rb
Add rubygems for 1.8 compatibility
Remove some testing bits and add next/prev UI functions
Add pagination, various fixes to the UI

o Implement pagination (next, prev) in UI
o Add menusize and page accessors for UI
o Add background harvester for fetching results in a sep. thread
o Add search summary bar
o Offset fixes to get(), info(), and menu()
o Some minor tweaks to the curses config