FirstStep: Add credentials-file for GitHub data

[codingCookie]

I've added a credentials-file for github username & password to avoid typing data over and over again I know it isn't a caching, but i think it's a first step and the idea behind is similar - avoid typing data over and over again

connects to #13

[rajikaimal]

Need changes with the current implementation

13

[charithsoori]

@codingCookie we have a conflict here :)

[codingCookie]

@charithsoori I'm still implementing to have both possibilities - It's a little bit busy at the moment - i try to do it as soon as possible...sorry :/