Added quick first pass at adding basic usage docs.

Author: bsboiko

README.md

@@ -1,2 +1,79 @@
 # re-codemirror
-A reagent component that wraps CodeMirror
+A reagent component that wraps [CodeMirror](https://codemirror.net/) and provides entry points for a reactive state manager.
+
+## Usage
+To use `re-codemirror` add the git dependency to your project and use the latest sha release.
+
+### Basic
+
+```clojure
+(ns ...
+  (require [re-codemirror.core :as re-cm]))
+
+;; Reagent Component
+(defn editor
+  []
+  [re-cm/codemirror
+   {:lineNumbers true}
+   {:name "form-input"}])
+```
+
+### Mode
+
+```clojure
+(ns ...
+  (require ...
+           [cljsjs.codemirror.mode.clojure]))
+
+;; CodeMirror component
+(defn clojure-editor
+  []
+  [re-cm/codemirror
+   {:mode "clojure"}
+   {:name "form-input}])
+```
+
+### Linting
+
+```clojure
+(ns ...
+  (require ...
+           [cljsjs.codemirror.mode.javascript]
+           [cljsjs.codemirror.addon.lint.javascript-lint]))
+           
+;; CodeMirror component
+(defn javascript-editor
+  []
+  [re-cm/codemirror
+   {:mode    "javascript"
+    :gutters ["CodeMirror-link-markers"]
+    :lint    true}
+   {:name "form-input"}])
+```
+
+### Reactive Statement Management
+
+Manage state through [re-frame](https://github.com/yetanalytics/re-frame).
+
+```clojure
+(ns ...
+  (require ...
+           [re-frame.core :refer [subscribe dispatch]]))
+
+;; CodeMirror component
+(defn re-frame-editor
+  [sub-key dis-key]
+  [re-cm/codemirror
+   {}
+   {:name   "form-input"
+    ;; subscribe to re-frame and get a possible text value
+    :value  @(subscribe [sub-key])
+    ;; This supports a simple use case of just catching when the text value changes.
+    ;; Update the full text value from the .getValue function from CodeMirror
+    ;; Any event can be added that is supported through CodeMirror in the map
+    ;;    "name" (callback-fn ...)
+    :events {"change" (fn [this [code-mirror-obj change-obj]]
+                        (dispatch [dis-key (.getValue code-mirror-obj)]))}}])
+```
+
+You can also manage state through any other library of your choice.