Update Readme

Readme.md

 # Sheets api
-A dam simple server to return data from a google spread sheet. The server can fetch data from a google spread sheet and saves the links in the sheet in a memory-cache. It will then return other urls in the same row.
+A simple server to return data from a google spreadsheet. The server fetches data from a google spreadsheet and saves the links stored in the sheet in a memory-cache. The sheet with the links has to be created by hand. See below for details. It will then return other urls stored in the same row of the spreadsheet.
 
 ## Configuration
 You can configure the app over env vars, args or the config.json file. 
@@ -16,18 +16,18 @@ You can configure the app over env vars, args or the config.json file.
 ```
 
 ## Google Sheet
-As a data provider the app uses [google sheets](https://www.google.com/sheets/about/). You can upload a sheet and use it in the api. To do so, you need to follow two simple rules
-* The first row is the description of the cols. If you use the keyword url or url1-9 you define a relevant col for the api.
+As a data provider the app uses [google sheets](https://www.google.com/sheets/about/). You can upload a sheet and use it in the api. To do so, you need to follow two simple rules:
+* The first row is the description of the columns. If you use the keyword url or url1-9 you define a relevant column for the api.
 * The second row is a description of the data provenance. We use this description as a provider name in the api
 * All other rows are data. You can have empty and null fields.
 
 | Keyword       | Dodis Url1    | HLS URL |
 | ------------- |:-------------:| -----:|
-| The keyword      | Diplomatic documents of switzerland | Historical lexicon of switzerland |
+| The keyword      | Diplomatic Documents of Switzerland | Historical Lexicon of Switzerland |
 | Aussenpolitik      | https://dodis.ch/T171      |   https://hls-dhs-dss.ch/articles/026455/2012-05-24/ |
   
 ## Endpoints
 ### GET /v1/update
-Update the current in memory DB with the new data from the google sheet
+Update the current in memory DB with the new data from the google sheet.
 ### GET /v1/sameas/{url}
-Get sameas resources from the memory DB
+Get sameas resources from the memory DB.
\ No newline at end of file