Signed-off-by: Timothée Peignier <timothee.peignier@tryphon.org>

The django.core.files.base module uses the cStringIO package where available. However, unlike StringIO, cStringIO does not support unicode data, and the result is additional null bytes being entered into the output file.

The trick seems to be to convert the data into a byte string before passing it into ContentFile, which I do here using Django's smart_str() utility.

Signed-off-by: Timothée Peignier <timothee.peignier@tryphon.org>

Signed-off-by: Timothée Peignier <timothee.peignier@tryphon.org>

This introduces an option in PIPELINE_CSS package rules for turning off
the feature to make relative paths absolute. In certain deployments,
relative paths are important and need to be preserved.

Packages can now set absolute_asset_paths to False to turn off this
functionality.

Signed-off-by: Timothée Peignier <timothee.peignier@tryphon.org>

improving windows paths support

The CSS and JS compressors can be turned off individually by specifying
either None or an empty string as the value for either
PIPELINE_CSS_COMPRESSOR or PIPELINE_JS_COMPRESSOR.

This is useful when you want to conditionally disable a compressor based
on what's available locally, or when a byproduct of a compiler is to
compress the content.

Signed-off-by: Timothée Peignier <timothee.peignier@tryphon.org>

This means that it simply prints "--verbose" is not a valid option and doesn't write the result to standard out.

Signed-off-by: Timothée Peignier <timothee.peignier@tryphon.org>