Improve network performance for VirtualBox

Without those lines, VitrualBox machines are being very slow with all network operations (tested only in OS X Lion, but they are supposed to work everywhere). See https://github.com/mitchellh/vagrant/issues/1807
abord build if mergeConfig returns an error and fix duplicate error message
Add proper bash completion for "docker push"
testing, issue #1948: Increase TestAttachDetach and TestRunDetach timeout
Add test
add missing error check
added initial draft of the Docker infrastructure doc
Clean out a few outdated FIXME items
Merge pull request #2061 from dotcloud/1948-test-detach

testing, issue #1948: Increase TestRunDetach timeout
Cleanup whitespace in API 1.5 docs

remove whitespace on blank lines
[docs] use angle brackets in MAINTAINER example email
Merge pull request #2109 from shamrin/patch-4

[docs] use angle brackets in MAINTAINER example email
Fix contrib/mkimage-debian.sh apt caching prevention
Merge pull request #2106 from mastahyeti/api_1.5_docs_whitespace

Cleanup whitespace in API 1.5 docs
Merge pull request #2103 from tianon/clean-out-fixme

Clean out a few outdated FIXME items
Insert popularity and boost docs results.
use empty string so TempDir uses the OS's temp dir automatically (Closes #2117)
Use correct auth config when logging in.
fix rm -v
Fix some error cases where a HTTP body might not be closed

Refs #2126