Update d/control: Add missing misc-depends, and wrap-and-sort control

The source package uses debhelper, but it does not include
${misc:Depends} in the given binary package's debian/control entry. Any
debhelper command may add dependencies to ${misc:Depends} that are
required for the work that it does, so recommended best practice is to
always add ${misc:Depends} to the dependencies of each binary package if
debhelper is in use.
d/source: Add debian-source-format

Explicitly selecting a source format by putting the format in
debian/source/format is recommended. This allows for future removal of
the 1.0 default for the package source format and, depending on the
source format, may allow unambiguous declaration of whether this package
is native or non-native.
d/control: remove build-dependency on build-essential

The package declares a depends on a build essential package without
using a versioned depends. Packages do not have to build-depend on any
package included in build-essential. It is the responsibility of anyone
building packages to have all build-essential packages installed. The
only reason for an explicit dependency on a package included in
build-essential is if a particular version of that package is required,
in which case the dependency should include the version.
d/control: Fix Vcs-git (vcs-field-uses-unknown-uri-format)

Add Vcs-* and Homepage fields, and add Perdo and myself as uploaders
d/control: Fix packages descriptions

The first line of the "Description:" should omit any initial indefinite or definite article: "a", "an", or "the". 

The synopsis (first line in the package "Description:" field, the short description) ends with a full stop "." character. This is not necessary, as the synopsis doesn't need to be a full sentence. It is recommended that a descriptive phrase is used instead.

The extended description (the lines after the first line of the "Description:" field) is empty.
d/control: python-contrail, fix section name

This package has a name suggesting that it belongs to a section other than the one it is currently categorized in.