embedding README updates

this provides some more current directions for testing

ports/cef/README.md

@@ -1,15 +1,11 @@
 How to test:
 
-1. Go to http://cefbuilds.com/ and download a binary for your OS/arch
-2. Unpack the (huge) archive
-3. Create both Debug and Release build types for CEF (```./build.sh [Debug|Release]```)
-4. Build servo with ```./mach build-cef [--release]```
-5. Run a CEF-based executable with the embedding crate preloaded:
-	* Linux: ```LD_LIBRARY_PATH=/path/to/cef-bin-unpack-dir/out/$build_type LD_PRELOAD=/path/to/servo/build/libembedding-*.so [CEF EXE]```
-6. Enjoy CEF-powered crashes
+1. Build Servo's embedding crate (```./mach build-cef [--release]```)
+2. Build ECEF (https://github.com/zmike/ecef)
+3. See ECEF README
+4. Enjoy CEF-powered crashes
 
 Notes:
-* Running with the Debug build in GDB is EXTREMELY slow on startup. Only use this if you are actively debugging an unimplemented CEF interaction.
 * The contents of `interfaces/` are entirely autogenerated. To
   regenerate, see https://github.com/zmike/cef-rebase/blob/master/README.md for full instructions