update to latest debian release.
Add VMWare provider build.
Add pycurl to preseed.
Add #! and path to script file.
Use variables in config, remove versions in file names

There was a lot of repeated information in the config for the virtualbox and vmware configuration. Moving it to variables reduces it down to a single placee to update.

There will only be one version of ubuntu or debian in the repository, looking to the iso_url variable in the config will identify the version. this will reduce renaming requirements. If you want to build an old version check out an older commit.
Short script names for re-use. Shorten platform names for re-use.

There will only ever be 64bit ubuntu and debian distributions for springboard. Specific versions will be the latest stable at the time of the springboard build. It should not be necessary to reference the distribution versions in the files. It will also save re-naming ad infinum as new versions are released.
Merge remote-tracking branch 'dopry/master'

Conflicts:
	packer/http/debian64-wheezy-preseed.cfg
	packer/scripts/5.postinstall.sh