added floatingip
added associate_floatingip and disassosiate_floatingip mock test
update associate_floatingip for real
deleted update_floatingip and changed variable name from floating_network_id to floatingip_id.
fixed disassociate_floatingip bug and update floatingip-* mock values.
updated for ruby naming conventions.
deleted old files eg. floatingip.rb
[xenserver] added create_sr request (create Storage Repository)
[xenserver] added destroy_sr request (destroy Storage Repository)
[xenserver] added unplug_pbd request
[xenserver] added new requests to compute service

- unplug_pbd
- destroy_sr
- create_sr
[xenserver] added unplug method to PBD model
[xenserver] missing Pool model attribute, new methods

- Added missing suspend_image_sr attribute
- added default_sr getter/setter
- added suspend_image_sr getter/setter
- added generic set_attribute method
[xenserver] added new methods to StorageRepository model

- destroy/save operations
- generic set_attribute method
[xenserver|docs] Added new example that covers a Citrix KB ctx116324 article

Translated http://support.citrix.com/article/ctx116324 to fog/xenserver
added server metadata operations for Fog::Compute::RackspaceV2
refactored Fog::Compute::RackspaceV2 metadata to take collection as a parameter rather than using it as part of the method name.
change copy_object docs to YARD
fixing broken metadata tests
[xenserver] updated create_sr request documentation, fixed default values