Add documentation (#3)

* Add documentation

* Update ApiSpecification.md

* Update ApiSpecification.md

Breeze.Documentation/ApiSpecification.md

+`/api/v1/`  
+  
+## Request/Response
+
+RESPONSE: responsecode (`200` if success, `400`/`500` if error, see later)  
+  
+HEADERS
+`Content-Type:application/json`  
+  
+## Errors
+
+`400` series status codes for client issues & `500` series status codes for server issues.  
+API should standardize that all `400` series errors come with consumable JSON error representation.  
+  
+BODY  
+```
+{
+  "message" : "Something bad happened :(", // ex.Message maybe?
+  "description" : ex.ToString()
+}
+```  
+
+## Key Management
+
+```
+GET /wallet/general - Displays general information on the wallet 
+GET /wallet/sensitive - Displays sensitive information on the wallet 
+GET /wallet/status - Displays dynamic information on the wallet 
+POST /wallet/create - Creates the wallet
+POST /wallet/load - Loads the wallet and starts syncing
+POST /wallet/recover - Recovers the wallet
+DELETE /wallet - Deletes the wallet
+```
+	
+## Syncing
+
+```
+GET /wallet/mempool/?allow=[true/false] - Allows or disallows mempool syncing
+```
+
+## Key Monitoring
+
+```
+GET /wallet/receive/[account1/account2] - Displays unused receive addresses of the specified wallet account
+GET /wallet/history/[account1/account2] - Displays the history of the specified wallet account
+GET /wallet/balance/[account1/account2] - Displays the balances of the specified wallet account
+```
+
+## Transaction building and sending
+
+```
+POST /wallet/build-transaction/[account1/account2] - Attempts to build a transaction with the specified wallet account
+POST /wallet/send-transaction - Attempts to send a transaction
+```