Only use vagrant 1.4 nfs changes when running vagrant 1.4.
Merge pull request #115 from sciurus/guard_vagrant14_nfs_changes

Only use vagrant 1.4 nfs changes when running vagrant 1.4.
Allow changing disk bus
Document setting disk bus
Merge pull request #118 from sciurus/configurable_disk_bus

Allow changing disk bus
Add kernel/initrd/cmd_line directives for the qemu driver
Corrected a wrongly spelled key and added domain_name to the error output
Merge pull request #119 from teto/error_correction

Corrected a wrongly spelled key and added domain_name to the error outpu...
Added entries in README.md
Add provider specific default_prefix option.

This patch adds support for a provider specific default_prefix option.
When set, this value is used instead of the project's dir name as the
prefix for the machines being created.
Merge pull request #122 from purpleidea/customname

Add provider specific default_prefix option.
Add network debugging output
Remove one branch that can never be taken and comment another that can only be taken in older vagrant
Create default network if needed. Relates to #102.

This commit

* renames the option default_network to default_network_name
* introduces the option default_network_address, since we need an
address in order to create a network
* handles creation of the default network similarly to other private
networks if needed
Fail if any existing networks configured to have DHCP do not have it. Relates to #103 and #123.
Make network creation thread-safe, closes #104
Fix logic for debug output about finding network by ip
Use vagrant-libvirt and 192.168.121.1/24 as default network settings.
Closes #125.
Rename default network to management network. Closes #126.

The use of the term default makes discussing this network confusing.
This network must exist and be configured a certain way in order for vagrant
to manage a VMs configuration, so lets call it the management network instead.
Merge pull request #120 from teto/kernel2

Add kernel/initrd/cmd_line directives for the qemu driver