Fixes #35: Use of Powershell in preinstall scripts stymies Windows update slipstreaming
Skip all .bat/.cmd scripts that start with an underscore (floppy/00-run-all-scripts.cmd)
Added debug variables PACKER_DEBUG and PACKER_PAUSE (floppy/00-run-all-scripts.cmd)
Moved A:\ to end of the PATH, to give precendence to installed applications (floppy/00-run-all-scripts.cmd)
Search for tee.exe in the PATH first, before looking in A:\ (floppy/00-run-all-scripts.cmd)
Removed extra " char in junction command (floppy/openssh.bat)
Replace IF with GOTO to avoid delayed expansion issues, and to easily add future provisioners (script/provisioner.bat)
Replace all ! with % as appropriate
Use wget or bitsadmin, if found in the PATH, or on A:\, otherwise use powershell
Skip downloading any file if it's found on a:\, d:\ or in the PATH
This addresses the following issues after slipstreaming Windows updates into installation media:
After installing all Windows and .Net 3.51 updates, running powershell during installation would produce:
"Version v4.0.30319 of the .NET Framework is not installed and it is required to run version 3 of Windows PowerShell."
After installing all Windows and .Net 3.51 updates, and then .NET 4.51 (NDP451-KB2858728-x86-x64-AllOS-ENU.exe),
running powershell during installation would produce:
"Internal Windows PowerShell error. Loading managed Windows PowerShell failed with error 80070002."
Clean up error reporting in install-winrm.cmd

Based on comments in
https://github.com/misheska/basebox-packer/pull/39#issuecomment-32768677
but I'm seeing non-fatal errors in the winrm installation so I don't think
we want to always fail if we see a non-zero errorlevel.
Also standardized the script for all Windows flavors.
Updated Mountain Lion CLI tools URL for April 2014
ignoring editor temp files
Adding option to add Chef to the PATH (or for any other provisioner)
Adding option to add Chef to PATH (or any other provisioner)
Adding template for Ubuntu 14.04 (beta) - VMware Tools/VirtualBox Guest Tools currently do not work with the 3.13 kernel
Rebooting during packer run to capture latest kernel settings so shared folders work
Adding workaround to fix shared folders not working with VirtualBox 4.3.10
Update ubuntu1404 configuration to 14.04 final
Merge pull request #53 from markprzepiora/master

Update ubuntu1404 configuration to 14.04 final
I added some lines to each vmtools.sh script for Debian machines to make a symlink that is needed. It will only be needed until 4.3.11 comes out, you can ignore this if too specific :)

Find more here.
https://www.virtualbox.org/ticket/12879
Merge pull request #50 from rasa/fix-debugging-v2

Fixes #35: Use of Powershell in preinstall scripts stymies slipstreaming
Merge pull request #51 from rasa/winrm-fixes

Clean up error reporting in install-winrm.cmd
Adding template for Ubuntu 14.04 server 32-bit
Update README.md
Adding Docker template for Ubuntu 14.04 (docker command is now docker.io)
Updating CentOS templates with workaround for VirtualBox 4.30 shared folders
Updating OracleLinux templates to match advances in the CentOS templates
Adding templates for Windows 8.1 with Update