Added v7 diagrams and .gitattributes file.

Author: Bilge

.gitattributes

@@ -0,0 +1,4 @@
+/.*         export-ignore
+/docs       export-ignore
+/test       export-ignore
+/README.md  export-ignore

README.md

@@ -550,8 +550,8 @@ Porter is published under the open source GNU Lesser General Public License v3.0
   [Porter icon]: https://avatars3.githubusercontent.com/u/16755913?v=3&s=35 "Porter providers"
   [Porter transformers icon]: https://avatars2.githubusercontent.com/u/24607042?v=3&s=35 "Porter transformers"
   [Porter connectors icon]: https://avatars3.githubusercontent.com/u/25672142?v=3&s=35 "Porter connectors"
-  [Class diagram]: https://github.com/ScriptFUSION/Porter/blob/master/docs/images/diagrams/Porter%20UML%20class%20diagram%205.0.png?raw=true
-  [Data flow diagram]: https://github.com/ScriptFUSION/Porter/blob/master/docs/images/diagrams/Porter%20data%20flow%20diagram%205.0.png?raw=true
+  [Class diagram]: https://github.com/ScriptFUSION/Porter/blob/master/docs/images/diagrams/Porter%20UML%20class%20diagram%207.0.png?raw=true
+  [Data flow diagram]: https://github.com/ScriptFUSION/Porter/blob/master/docs/images/diagrams/Porter%20data%20flow%20diagram%207.0.png?raw=true
   [ECB]: https://github.com/Provider/European-Central-Bank
   [CurrencyRecords]: https://github.com/Provider/European-Central-Bank/blob/master/src/Records/CurrencyRecords.php
   [ECB test]: https://github.com/Provider/European-Central-Bank/blob/master/test/DailyForexRatesTest.php