builder/amazon: Extend timeout and allow user override [GH-1533]

fix quote in variable name

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

Vagrantcloud selfhosted

Amazon Instance Builder Docs Still Reference Deprecated S3Endpoint

Update document about qemu builder for [GH-1407].

Fix detecting guest additions URL

provisioners/ansible-local: always use an inventory file

builder/qemu: add ability to set cache mode for disk

updated step_clone_vmx.go to work with vmx files using sata

figure out VirtualBox version on FreeBSD

Update SaltStack provision to https

builder/parallels: Default cdrom0 should be disconnected

post-processor/vsphere: fix object address by appending "/"

Merge branch 'fix_qemu_size_argument' of https://github.com/berendt/packer into berendt-fix_qemu_size_argument

Conflicts:
	website/source/docs/builders/qemu.html.markdown

Added struct to be passed to the Process function to render the vagrant ...

Instead of 1024m it shoud be 1024M. Using 1024m as value does not work:

---snip---
2014/10/27 10:21:41 packer-builder-qemu: 2014/10/27 10:21:41 Executing
/usr/bin/qemu-system-x86_64: []string{"-m", "1024m", "-redir",
"tcp:3213::22", "-device", "virtio-net,netdev=user.0", "-cdrom",
"/home/berendt/B1-Systems/openstack-appliance/packer_cache/436c246ce08d768bbacce00e39c11ecd09071565542788d08b3120de0228c9eb.iso",
"-machine", "type=pc-1.0,accel=kvm", "-vnc", "0.0.0.0:47", "-netdev",
"user,id=user.0", "-name", "openstack", "-drive",
"file=openstack/openstack.qcow2,if=virtio", "-boot", "once=d"}
2014/10/27 10:21:41 packer-builder-qemu: 2014/10/27 10:21:41 Started
Qemu. Pid: 2618
2014/10/27 10:21:41 packer-builder-qemu: 2014/10/27 10:21:41 Qemu
stderr: qemu-system-x86_64: -m 1024m: Parameter 'size' expects a size
==> qemu: Error launching VM: Qemu failed to start. Please run with logs
to get more info.
---snap---

- This is not a sustainable dependency management technique

This reverts commit c91de565.

- help resolve https://github.com/mitchellh/packer/issues/1533
  (although timeouts are always ultimately useless in a distributed
  system!)
- makes packer no more idempotent or janitorial than before
- derive maximum number of ticks from timeout
- default timeout to 300s (5m) to cater for global AMI copying
- allow user to override with AWS_TIMEOUT_SECONDS environment variable

Fix broken links docker builder docs.