Added an about file

Teams/grayMatter/ABOUT.md

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+
+# Gray Matter Team
+
+I'am Marcos, web/mobile developer from Paraguay!
+
+## About me
+
+My name is Marcos Godoy Gadea, I love to code :P
+
+## Languages
+
+- Ruby (on Rails)
+- PHP
+- Objective-C
+- Swift
+
+## The project
+
+I have an amazing project that will be really useful, using Swift and Ruby on Rails ;)