Use wp_is_writable wherever is_writable was used.
Bump required version to 3.6.0
move BackUpWordPress admin to network settings on multisite
refactor by using a constant and only 1 conditional
update more references to tools.php
use network_admin_url
fix syntax error
stupid mistake
more network_admin_url
fix backup action URLS
Merge branch 'master' into wp-is-writable-function-371

Conflicts:
	functions/core.php
Merge branch 'master' into multisite-admin-324

Conflicts:
	backupwordpress.php
use wp_safe_redirect
Merge branch 'master' into safer-redirects
ensure bwp is activated before addons
Exclude cache folder by default
Code formatting
Add trailing slash to excluded folders
Add trailing slash to found folders
Fix issue where modals showing underneath WP Admin bar

Fixes issue where the excludes color box modal was underneath the WP
Admin bar. See https://cloudup.com/iyWDvvgXGWm

Promotes a modal across the plugin to be 85% of the height of the
window. Also modified the scrolling of the file lists as I found it
more difficult to scroll the modal and scroll the small box inside as
well.