Allow configuring the indent and newlines from config file.

When newlines are automatically inserted by this tool, the browser inserts spaces between inline block elements. This can negatively impact layout. For example see:

https://stackoverflow.com/questions/5078239/how-to-remove-the-space-between-inline-block-elements

I propose to add configuration options for indentation and newlines into the config file defaulting to the current values of 4 spaces and true respectively.