Merge branch 'develop' into byte

Merge branch 'develop' into byte

Support multiple DBSecurityGroups for DBInstance. Fixes boto#1086.

Support multiple DBSecurityGroups for DBInstance. Fixes boto#1086.

Handle get_list well when filter returns empty set

Amazon gives a 404 or 400, which is fine, because 404 just means "does not exist". 400 is actually wrong, but we can handle it well.

Return an empty ResultSet in all cases.

Handle get_list well when filter returns empty set

Amazon gives a 404 or 400, which is fine, because 404 just means "does not exist". 400 is actually wrong, but we can handle it well.

Return an empty ResultSet in all cases.

Tagging 2.6.0 release.

Merge branch 'byte' of github.com:ByteInternet/boto into byte

Merge branch 'byte' of github.com:ByteInternet/boto into byte

Tagging new release.