Add some usage examples to tutorial

[langner]

What I have in mind:

• example for simple parsing using ccget
• example for simple parsing within Python
• example for using a method
• example for using a bridge
• ...

[Schamnad]

I have started working on resolving this issue. I have presently made an example.rst file containing examples for simple parsing using ccget. I will be working on the other aspects in the upcoming week.

Presently I have submitted a pull request for the first feature.

[langner]

Relevant: #30

[langner]

Most of this was done, we'll add more as needed.