Merge pull request #4727
246659a gitian: make tarballs deterministic and nuke .la files from build output (Cory Fields)
c54d647 travis: let travis use shared libs for tests (Cory Fields)
4bbbdf3 gitian: quick docs update (Cory Fields)
1aead42 gitian: descriptors overhaul (Cory Fields)
5f93ec2 depends: Add a package for qt4.6. Linux uses it by default. (Cory Fields)
4302fa6 depends: Use pic for all linux dependencies (Cory Fields)