Update README

.editorconfig

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+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true

.gitignore

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+/vendor/

README.md

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 # Simple OAI-PMH 2.0 Data Provider
 
-This is a stand-alone and easy to install data provider implementing the [Open Archives Initiative's Protocol for Metadata Harvesting (OAI-PMH)](https://openarchives.org/pmh/). It serves records in any metadata format from directories of XML files using the directory name as `metadataPrefix`, the filename as `identifier` and the filemtime as datestamp. 0-byte files are considered deleted records and handled accordingly. Resumption tokens are managed using files. Sets are currently not supported.
+This is a stand-alone and easy to install data provider implementing the [Open Archives Initiative's Protocol for Metadata Harvesting (OAI-PMH)](https://openarchives.org/pmh/). It serves records in any metadata format from directories of XML files using the directory name as `metadataPrefix`, the filename as `identifier` and the filemtime as timestamp. 0-byte files are considered deleted records and handled accordingly. Resumption tokens are managed using files. Sets are currently not supported.
 
 Just put the records as XML files in the data directory, adjust a few configuration settings and you are ready to go!
 
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 1. Run `composer create-project opencultureconsulting/oai_pmh <path>`.
 
-2. Create a data directory in a not publicly accessible location outside of `<path>`. Create a subdirectory inside the specified data directory for every format (i. e. `metadataPrefix`) you want to provide.
+2. Create a data directory in a location not publicly accessible (i. e. outside of `<path>`). Create a subdirectory inside the specified data directory for every format (i. e. `metadataPrefix`) you want to provide.
 
-3. Copy `Configuration/Main.template.php` to `Configuration/Main.php` and adjust the settings according to your preferences. Don't forget pointing `$config['dataDirectory']` to your newly created data directory.
+3. Copy `Configuration/Main.template.php` to `Configuration/Main.php` and edit the settings according to your preferences. Don't forget pointing `$config['dataDirectory']` to your newly created data directory.
 
 4. Put the records into the respective directories according to their format. Each record has to be a separate XML file with its `identifier` as filename (e. g. the file *12345678.xml* can be adressed using the `identifier` *12345678*). Optionally you can maintain deletions by keeping 0-byte files for deleted records.