add Cxl::Cli class

bin/cxlc

@@ -1 +1,10 @@
 #!/usr/bin/env ruby
+
+lib_dir = "#{File.dirname(__FILE__)}/../lib/cxl"
+$LOAD_PATH << "#{lib_dir}/cxl/lib"
+$LOAD_PATH << "#{lib_dir}/yawpa/lib"
+$LOAD_PATH << "#{lib_dir}/whittle/lib"
+
+require "cxl/cli"
+
+exit(Cxl::Cli.run(ARGV.dup))