UTF-8 encode query/scheme_uri to match sqlite3
UTF-8 encode query/scheme_uri to match sqlite3

previously the scheme_uri was encoded as ASCII-8BIT from the HTTP
request URL. this caused sqlite3 strings to not match since they
are UTF-8 encoded.

refs #14 #15

abargnesi/bel.rb,OpenBEL/bel.rb,ncatlett/bel.rb,ncatlett/bel.rb,abargnesi/bel.rb,nbargnesi/bel.rb,OpenBEL/bel.rb,nbargnesi/bel.rb,nbargnesi/bel.rb,OpenBEL/bel.rb,abargnesi/bel.rb,OpenBEL/bel.rb,abargnesi/bel.rb,OpenBEL/bel.rb,OpenBEL/bel.rb,abargnesi/bel.rb,nbargnesi/bel.rb,abargnesi/bel.rb,nbargnesi/bel.rb,nbargnesi/bel.rb,OpenBEL/bel.rb