Revert "removed ability to push binaries from the master"

This reverts commit 4e6ff4e65eb1a1f9e07add96041805bdd74c87e9.
added support for executable push and get

   push -x also pushes the local remote binaries
   then it is possible to use the fetch?x=true to retrieve them in a tar.gz format
now install also copies executables
added support for scan pkg dir
added compilation of test executables

by default, test execs are compiled, too there is an option to skip test
added a get protocol nice with wget

I need to add a simple html page if requesting the directory so that wget -r works
added get/list protocol for binaries
Merge branch 'master' of github.com:gopack/gpk