Doc:  Remove old versions for consistent behavior

If you have older versions of the gem also installed, this causes the
"v2" functionality to be flakey.  (From IRC with Matt Ray, tested by
me)  

Included warning and command examples to show how to check and remedy 
this situtation.
default to 'v2' API, updated logging to show priority
KNIFE-182 merge
KNIFE-281: update knife to pass knife's https_proxy and http_proxy setting onto fog; added the ability to specify ssl_verify_peer
Initial tests for flavor list.  V1 and V2.
Merge branch 'KNIFE-281' of git://github.com/rackerlabs/knife-rackspace into test_runner
Merge pull request #44 from rackerlabs/KNIFE-281

KNIFE-281 Fog Proxy Support
Image list tests, plus filtering some more transient data.
KNIFE-282: Add the ability to inject files on server creation
fixing merge
KNIFE-282: fixing formatting
Server management (create/list/delete) test
Updated VCR placeholders to be more URL friendly
Merge branch 'master' of git://github.com/opscode/knife-rackspace into test_runner
Refactor to share tests
Ready for Travis
Default rake task runs once with cassettes, once without
Switching placeholders from {...} to [...] to try to avoid invalid URIs
Continuing the quest for a placeholder that consistently passes URI validation.  Not sure why the invalid URI error is not consistent across all systems.
Don't require pry-debugger, it isn't ruby 1.8.7 friendly.