Fix possible NPE if the null class loader is searched
[MODULES-201] Ensure that JarEntry.getCodeSigners is called after the stream is read
Merge pull request #57 from doctau/master-MODULES-201

[MODULES-201] Ensure that JarEntry.getCodeSigners is called after the st...
Remove an awful lot of CRs
Add maven central repo by default & improve download retry logic