Updating Readme to have info about querying.

README.md

@@ -32,4 +32,46 @@ User `Authorization` header:
 ( I don't suggest using this unless you have an internal Shotgun sever. )
 ```
 Basic-user <base64 user_name:user_password>
-```
+```
+
+## Query String
+
+- page (int): Page of results to return.
+- limit (int): Number of results per page to return
+- fields (comma seperated listed of string): The fields/columns to return.
+- q (string): The query to execute. Syntax below.
+
+
+## Query Syntax
+
+There are 3 formats for the query but they all have the same basic structures for the filters themselves. Each filter is defined by an array of 3 values. 
+
+```
+[<name>, <relation>, <values>]
+```
+
+- Name and relation are both string.
+- Values can be either a value (string, int, bool, etc) or an array of values.
+
+### Format 1 
+
+```
+q=and([<name>, <relation>, <values>],...)
+q=or([<name>, <relation>, <values>],...)
+```
+
+### Format 2
+
+```
+q={"logical_operator":"and", "conditions":[[<name>, <relation>, <values>],...]}
+```
+
+### Format 3
+
+**This format is currently has a bug.**
+
+This format the logical_operator is always assumed to be "and".
+
+```
+q=[[<name>, <relation>, <values>],...]
+```