Adding cost-related stuff
update default EC2 AMIs and add Sydney provider

add EC2 provider ap-southeast-2 (Sydney)
use images.py script to get updated list of AMI:description for the 8 EC2 providers
then output content to ec2_images.py for dict with AMIS.
create scripts directory and put get_ec2_amis.py
Display bytes/sec instead of operations/sec for disks.
Clarify stat labels (add units, remove interface/disk names).
Fix labels in rules to be consistent with stat labels.
Fix network/disk rules.

specify network send (as network-tx) and disk-write.
modify relevant thresholds (added the unit too).
add pricing on the create machine wizzard, plus 2 scripts to get pricing from ec2/rackspace

show pricing per image/size combination, since ec2/rackspace charge differently for different
image for the same size. Check PRICING_ISSUES for more info and to get the pricing
add units to rule metric values
Automated built of mist.js
Merge branch 'images'
update pricing json to include currency and period
update scripts to include currency
on list_locations return default location, rather than fail
allow spaces in Rackspace server names

remove space-stripping code for Rackspace, since it affects only
first gen servers. Next gen allow the spacing in server names
fill in the backend in  machine create wizzard, if there exist only 1 backend. Also for location/key
re-enable patch for removing spaces in names for first gen rackspace backends
remove pricing issues notes
Merge branch 'cost-display'
Automated built of mist.js