Update Vagrant download url to 1.3.4 - #11

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Bump version to 1.3.4 in vagrant.nuspec - #11

Fix #11: Update Vagrant to 1.3.4

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge pull request #12 from rogeriopradoj/fix-11

Fix #11: Update Vagrant to 1.3.4