Revert "Revert "Add ProGuard section to README.""

This reverts commit 3cb069b214c8299d02a7025c538dff2c672da63b.
Start change log for next version.
Add website.
Delete unused background.
Logo in readme.
ProGuard information is now on the website.
Remove reference to 'screenshot'.
Center the headings and image.
Website style tweaks. Give logo a drop-shadow.
Tweak changelog.
[maven-release-plugin] prepare release butterknife-parent-1.3.0
[maven-release-plugin] prepare for next development iteration
Add test verifying the view holder injection works correctly.
Add test to verify activity injection works.
Update ProGuard rules.
Comma
Fix superclass injection.

Closes #19. Closes #24. Closes #25.
Merge pull request #26 from JakeWharton/jw/superclass-injection

Fix superclass injection.
Bump version to 1.3.1.
[maven-release-plugin] prepare release butterknife-parent-1.3.1