Add kerberos (krb5)

Change clamav.rb to make it work with zlib 1.2.11

Corrected dependencies of several package files

Change wine.rb to make it work for armv7l

Change protobuf.rb to install files through CREW_DEST_DIR

Change go.rb to set pre-defined GOROOT

Change libcap.rb to make it work with gperf 3.1

Fix wrong option in cmatrix.rb

Change openssl to pass `make test` on armv7l

Add nodebrew 0.9.7

Remove package/python.rb, outdated binary package

Add vpnc package