Cleanup simple and simple paging/chunked
Removed simple-with-options example
Cleanup hello world example
Cleanup output example
Cleanup input output example
Removed local copy of pengines.js
Clear content window when switching example
Cleanup expert system example
Removed assert/retract demo
Cleanup nondet RPC demo
Removed remote pengine example
Cleanup 2 pengines
Removed `handlers example`
Removed source-from-predicate example
Removed source-from-url example
Removed separating-results examples
Added Escher
Updated I/O
Updated database example.
Hihglight correct buttons after first