Merge pull request #14 from phips/master

Updated InstanceType documentation
Allow undef or arrayref in AvailabilityZone.pm
Ignore more files
Add last few changes here
Use AWS signatuve v2 and SSL by default
Update Changelog and docs
Update deps in Makefile.PL
Few more doc changes
Update copyright on README
Decouple CIDR IPs from security group auth
Make region_name accept undef
Make group_name accept undef
Merge pull request #16 from EtienneM/master

group_name can be undef
Add UserData to run_instances for test purposes
Permit associate_address in VPC (RT#82139)
Prepare 0.23
run_instance tweaks: Cannot submit subnet with group name; must use group id instead. Added support for this edge condition.  Also added PrivateIpAddress option.
Merge pull request #18 from brettpaden/options_for_run_instance

run_instance tweaks
Added optional parameter AddressingType (deprecated but still implemented in EC2 API and usefull for eucalyptus clouds with only private addressing)
Merge pull request #20 from vincent-k/master

Added optional parameter 'AddressingType' to the 'runInstance' method.