Fix #2, Improve indendation and Image presentation

I have set the image to a better size.Further changes after testing.
drawer activity. The padding was defined in the xml. This has
now been removed.
I increased the divider height between the rows in the main listview.
I have set the placeholder of the image in the article display activity
to a blank - white image such that the loading animation does not lose
its effect.
I improved indendation.
I changed the method of fetching the JSON array, testing for #5
This shall be used to build APK v0.2.2

Signed-off-by: Aditya Prasad <adityaprasadiskool@gmail.com>