Add an obfuscation depth parameter. Tested on Wordpress v4.0.1.

git-svn-id: https://plugins.svn.wordpress.org/wp-obfuscator/trunk@1032393 b8457f37-d9ea-0310-8a92-e5e31aec5664
Modify Version tag in wp-obfuscator.php to 0.4

git-svn-id: https://plugins.svn.wordpress.org/wp-obfuscator/trunk@1032395 b8457f37-d9ea-0310-8a92-e5e31aec5664