Add column and length information to Lint

As noted in id_with_extraneous_selector.rb,
Sass::Selector::SimpleSequence#source_range sometimes lies about its
line. So for now the linter reports the line number with
SimpleSequence#line and discards column and length information.

Change-Id: Ibc71b5662a0797046230287a4ff40b61fffb01a0
Reviewed-on: http://gerrit.causes.com/37222
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>
Support column and length in XMLReporter

Change-Id: Ibe3a3f9012a9453e0ed9cea47f8b54afba2d6dd9
Reviewed-on: http://gerrit.causes.com/37223
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>