Remove xml:space="preserve" from SVGs

xml:space="preserve" is created by some vector editing programs for no
good reason. These logos do not have any whitespace only text node
descendants, so including this does nothing but increase file size.
Remove svg x and y attributes

The default is already 0.
Remove enable-background property from SVGs
Remove xlmns:xlink definition

xlink isn't used anywhere in the SVGs, therefore there's no need to
define the xlink namespace
Move svg opening tag to one line
Remove svg DOCTYPE declaration
Use consistent indentation
Use spaces instead of tabs
Fixes typos in README
Merge branch 'pedromaltez-pm/patch/optimise_svgs'
Adds a very simple, manual test
Adds support for installing through Bower
Updates README
Makes description consistent
v0.1.1

- Removes unnecessary SVG code #1, thanks @pedromaltez
- Code style fixes #1, thanks again @pedromaltez
- Adds very basic test
- Published to Bower