FreeBSD compatibility

- Use gopsutils istead of gosigar
- Bump go-dockerclient

closes #372

Godeps/_workspace/src/github.com/fsouza/go-dockerclient/AUTHORS

@@ -1,6 +1,8 @@
 # This is the official list of go-dockerclient authors for copyright purposes.
 
+Abhishek Chanda <abhishek.becs@gmail.com>
 Adam Bell-Hanssen <adamb@aller.no>
+Adrien Kohlbecker <adrien.kohlbecker@gmail.com>
 Aldrin Leal <aldrin@leal.eng.br>
 Andreas Jaekle <andreas@jaekle.net>
 Andrews Medina <andrewsmedina@gmail.com>
@@ -18,6 +20,7 @@ Cesar Wong <cewong@redhat.com>
 Cezar Sa Espinola <cezar.sa@corp.globo.com>
 Cheah Chu Yeow <chuyeow@gmail.com>
 cheneydeng <cheneydeng@qq.com>
+Chris Bednarski <banzaimonkey@gmail.com>
 CMGS <ilskdw@gmail.com>
 Craig Jellick <craig@rancher.com>
 Dan Williams <dcbw@redhat.com>
@@ -29,6 +32,7 @@ David Huie <dahuie@gmail.com>
 Dawn Chen <dawnchen@google.com>
 Dinesh Subhraveti <dinesh@gemini-systems.net>
 Ed <edrocksit@gmail.com>
+Elias G. Schneevoigt <eliasgs@gmail.com>
 Erez Horev <erez.horev@elastifile.com>
 Eric Anderson <anderson@copperegg.com>
 Ewout Prangsma <ewout@prangsma.net>
@@ -58,9 +62,11 @@ Liu Peng <vslene@gmail.com>
 Lorenz Leutgeb <lorenz.leutgeb@gmail.com>
 Lucas Clemente <lucas@clemente.io>
 Lucas Weiblen <lucasweiblen@gmail.com>
+Lyon Hill <lyondhill@gmail.com>
 Mantas Matelis <mmatelis@coursera.org>
 Martin Sweeney <martin@sweeney.io>
 Máximo Cuadros Ortiz <mcuadros@gmail.com>
+Michael Schmatz <michaelschmatz@gmail.com>
 Michal Fojtik <mfojtik@redhat.com>
 Mike Dillon <mike.dillon@synctree.com>
 Mrunal Patel <mrunalp@gmail.com>
@@ -79,7 +85,9 @@ Rob Miller <rob@kalistra.com>
 Robert Williamson <williamson.robert@gmail.com>
 Salvador Gironès <salvadorgirones@gmail.com>
 Sam Rijs <srijs@airpost.net>
+Sami Wagiaalla <swagiaal@redhat.com>
 Samuel Karp <skarp@amazon.com>
+Silas Sewell <silas@sewell.org>
 Simon Eskildsen <sirup@sirupsen.com>
 Simon Menke <simon.menke@gmail.com>
 Skolos <skolos@gopherlab.com>
@@ -96,4 +104,5 @@ Victor Marmol <vmarmol@google.com>
 Vincenzo Prignano <vincenzo.prignano@gmail.com>
 Wiliam Souza <wiliamsouza83@gmail.com>
 Ye Yin <eyniy@qq.com>
+Yu, Zou <zouyu7@huawei.com>
 Yuriy Bogdanov <chinsay@gmail.com>