update deps in setup.py and requirements.txt

Also updated the dep list in README.rst
static: update base starcluster AMI ids to 13.04
bump version to 0.95
spothistory: update help text for -d option

The -d option only overrides the -s option. The -d option was updated to
be relative to the -e option if it's provided.
Changelog: add updates for release 0.95
Merge branch 'release-0.95' into develop