Extend usage message for `swift download`

Make it clear that you do not have to provide either the container or
object positional parameters, and what swiftclient will do if you omit
them.

Change-Id: I3766fc1eabd51f197e2175771af579577a96c192
user defined headers added to swift post queries

This commit fixes a problem where headers passed through the option
--header were not taken into account when doing "post" queries.

Change-Id: Ia34808c53a1816d9956a98e0803d8c4d20d2ad44
Closes-Bug: #1226256
assertEquals is deprecated, use assertEqual (H602)

Change-Id: I75dac8693c079a153004f77dc1cda48f3ac6f51d
Make pbr only a build-time dependency.

This lets you build python-swiftclient packages that don't require pbr
to be installed at all. You would need pbr on the machine running
rpmbuild / debuild, but not on the machines that install the packages.

Unfortunately, this does not make python-swiftclient able to be
installed via pip 0.3.1 on Lucid; you'll need to uninstall the system
python-pip package and install a new pip some other way. Given that
pip < 1.3 doesn't perform SSL certificate validation for pypi (trivial
MITM attack, anyone?), you'd probably want to get a new pip anyway.

Change-Id: I85d4d77aacf094e48d39e48e750594b95dbc7af0
Merge "Make pbr only a build-time dependency."
Clarify main help for post subcommand

Fixes bug 1231321

Change-Id: I7014aa160ebe5ba0bc5a91de05e6858fc58f69e0
Merge "user defined headers added to swift post queries"
Merge "Extend usage message for `swift download`"
enhance swiftclient logging

* log to debug for successes and info for errors
* remove dead code, neither body or raw_body are sent in kwargs
* include resp.reason and response headers in logging
* remove trailing \n in logging. users who want them can set logging.basicConfig(format=FORMAT)
* add --info option to swift cli

Change-Id: If07af46cb377f3f3d70f6c4284037241d360a8b7
Merge "enhance swiftclient logging"
Fix a typo in help text: "downlad"

Change-Id: Icd6cf75f3c5758c13118060c19c9c000e28ef3ae
Closes-Bug: #1245082