Add prefix to avoid collision with app using lib

[odin-]

I did not fix Theme name in themes.xml. Perhaps that should be renamed also...

[odin-]

I renamed all resources. If that's too much just tell me and I'll just rename frags and layout.

[heinrichreimer]

Have you tested code auto completion for the attributes?
So if you type in a style attribute in a ParallaxLayout using Android Studio's Editor does it show a list with the available attributes from the library?
If not I think it may be safer to not rename styleable attributes.
The rest is perfect! Thank you for the PR!

[heinrichreimer]

On a side note: do you agree that the code will be published under the MIT license? I'm currently switching out the Apache license for the more permissive MIT license as you can read in #176

[heinrichreimer]

Ah and I don't think adding a prefix to the themes would be necessary as they are already prefixed Theme.Intro. and more importantly they are part of the public API so we can't change that without depreciating the old name slowly.

[odin-]

Seems to work (attaching picture).

MIT sounds like the saner choice. I am all in :-)

[heinrichreimer]

Oh, I meant in the layout editor when you edit the layout XML. Sorry, I must've made this more clear.

[odin-]

OK, I'll check that and amend if needed.

[odin-]

I had some problems getting autocomplete to work with both the new and old. So I cannot prove my change works -> revert changes for the attributes.