add license badge icon to readme
handles manifests with missing named attributes.

 - fixes #512
Merge branch 'master' of github.com:teprrr/Apktool into teprrr-master
Merge branch 'teprrr-master'
[skip] remove newline at EOF
[skip] added changes note for PR #84
Use ClassLoader.getSystemResourceAsStream() instead of <classname>.class.getClassLoader() to avoid catching an Error-throwable, which shouldn't have been done in the first place. Avoids suspending the debugger because of
ClassNotFoundException raised (at least in Eclipse's debugger) by it.