Added beginning of server API definition

Specifications/Server API.md

+# Server API
+
+The internal server's API is written and required to be entirely in JSON.  Requests to the server will use HTTP PUT requests to a localhost port (set up as a firewalled virtualhost in Apache).  This allows future scalability, including separating the intenal server onto a separate machine from the front-facing web and rest interfaces.
+
+## Server Requests
+
+Requests can be tested by the command line using curl, in the form:
+```bash
+curl -XPUT "http://shannonvm.village.virginia.edu:82" -d '{ "JSON" : "Request"}'
+```
+
+Requests should be of the form:
+```json
+{
+    "command" : "command_name",
+    "constellation" : {
+        "..."
+    }
+}
+```
+
+### Request API Definitions
+
+* `command` : the request command, such as `search`.  A full list of available options is available [here]()
+* `constellation` : all available parts of the constellation to enact the command over.  If the interaction does not utilize a constellation, this may be omitted.  The full specification for the constellation structure may be viewed [here]().
+    * Example: to request a constellation, the client may use the portions of the constellation that are known (`id` or `ark_id`)
+    ```json
+    {
+        "command" : "get",
+        "constellation" : {"id" : 12345}
+    }
+    ```
+
+## Server Responses
+
+The Server response API has the following form:
+```json
+{
+    "timing" : 50,
+    "request" : {
+        "Note" : "Entire original request will be returned to the client."
+    },
+    "error" : {
+        "type" : "Type of error",
+        "message" : "Error message"
+    },
+    "constellation" : {
+        "..."
+    }
+}
+```
+
+### Response API Definitions
+
+* `timing` : the time in milliseconds for the server to compute the response
+* `request` : the client's entire request to the server, as a sub-element.  This is mainly returned for the client's reference.
+* `error` : an error message, if the server had a problem handling the request.  This object has two subcomponents,
+    * `type` : the type of the error.  A full list of error types are defined [here](http://shannonvm.village.virginia.edu:83).
+    * `message` : a detailed error message (in English prose) stating the exact nature of the problem
+* `constellation` : The matching constellation for the client's query.  All portions of the constellation known to the server will be returned to the client.  If there are multiple constellations, this will return a list:
+```json
+{
+    "constellation" : [
+        { "..." },
+        { "..." },
+        { "..." }
+    ]
+}
+```