refactor internal messaging interface

Author: zendive

README.md

@@ -16,6 +16,7 @@ comparisons with the help of dedicated console commands.
 - function code included in comparison result in form of a string, may help to see if it was altered
 - document, dom-elements and other non-serializable objects are filtered-out from the results
 - self recurring references displayed only once, the rest of occurrences are filtered-out
+- basic integration with search functionality within devtools
 
 ### Limitations and workarounds
 
@@ -73,9 +74,15 @@ with a single argument, that will shift objects from right to left, showing diff
 
 - `jsdiff-devtools.js` registers devtools panel
   - injects `console.diff` commands into inspected window's console interface
-    - each function clones arguments and sends them via `postMessage` to `jsdiff-proxy.js`
-  - injects `jsdiff-proxy.js` that listens on window message and sends it further to chrome runtime.
-- when `jsdiff-panel.js` is visible in devtools, it reflects result of last invocation and listens for future messages
+    - each function clones arguments and sends them via `postMessage` to `jsdiff-proxy.js` in `jsdiff-console-to-proxy` message
+  - injects `jsdiff-proxy.js` that listens on window `jsdiff-console-to-proxy` message and sends it further to chrome runtime in `jsdiff-proxy-to-devtools` message
+  - listens on `jsdiff-proxy-to-devtools` and prepares payload for `vue/panel.js` and sends it with `jsdiff-devtools-to-panel-compare` message
+  - when user invokes devtools search command - informs `vue/panel.js` with `jsdiff-devtools-to-panel-search` message
+- when `vue/panel.js` is visible in devtools
+  - reflects result of last compare request
+  - listens on `jsdiff-devtools-to-panel-compare` requests
+  - listens on `jsdiff-devtools-to-panel-search` and tries to find query in DOM
+    - if search query contains upper-case letter - the search will be case-sensitive
 
 ### Screenshot