Some minor enhancements

- Deleted some unnessary backslashes
- Spacing fixes (space/tabs within footer.php, header.php and style.scss)
- Changed widget title's from h6 to h6.
- Replaced `echo esc_attr()` to `esc_attr_e()`.
- Added an argument called `depth` with value '-1' to footer-menu. See http://codex.wordpress.org/Function_Reference/wp_nav_menu for more info.
Added author.php and author-bio.php

- Added author.php and author-bio.php.
- Added Wordpress Twenty Thirteen Theme to credits. It has been of a lot of help!
WPF V0.2.5

- Updated the version to v0.2.5!