Added partially finished AutoMod docs

docs/docs/automod.md

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+##AutoMod
+
+AutoMod takes some inspiration from Reddit's [Automoderator](https://www.reddit.com/wiki/automoderator). It allows the user to define one or more *rules* based on regular expression (regex) patterns, in order for the bot to execute a *response* when triggered. This was initially the main and only feature of this bot, hence the name RegexBot.
+
+AutoMod rules are defined per-server within an object named `automod`. Each rule is defined as a name/value pair, with the name serving as its label.
+
+Sample AutoMod rules:
+```
+"Delete bilingual pirates": {
+    "regex": [ "pira(te|cy)", "pirat(a|ería)", ],
+    "response": "delete"
+},
+"Selective trigger": {
+    "regex": "secret",
+    "response: [
+        "delete",
+        "say #_ Don't say the s word, @_!"
+    ],
+    whitelist: { "channels": [ "#dont-say-secret" ] }
+}
+```
+
+#### Rules
+The following is a list of accepted members within an AutoMod rule:
+* regex (*string* or *string array*) - **Required.** Regular expression pattern(s) that trigger the defined rule.
+* response (*string* or *string array*) - **Required.** Response, or list of responses to execute.
+  * See the section below for more information on responses.
+* whitelist *[(entity list)](entitylist.html)* - Entities to which the rule exclusively applies to.
+* blacklist *[(entity list)](entitylist.html)* - Entities to which the rule does not apply to.
+* exempt *[(entity list)](entitylist.html)* - Entities which are exempt from the whitelist or blacklist rules.
+  * For example: If a particular role is blocked from triggering the rule, you may add an exemption for a single user within that role to be able to trigger the rule.
+* AllowModBypass *(boolean)* - Specifies if those defined within the *moderators* list for the server should be exempt from triggering this rule. Defaults to *true*.
+