Added shadow to login page.

git-svn-id: svn://svn.code.sf.net/p/subsonic/code/trunk@4194 104adb81-38d2-4886-885e-82898e39ce25
Nicer button styling.

git-svn-id: svn://svn.code.sf.net/p/subsonic/code/trunk@4195 104adb81-38d2-4886-885e-82898e39ce25