Provide --guess-depends-package-name=True option

[dmugtasimov]

This pull request provides option --guess-depends-package-name=True to guess depends package name in cases it cannot be found in repository. It useful when autobuilding deb-package from Python source distributions. It prevents installing generated deb-packages with wrong dependencies.

[dmugtasimov]

Comment for commit: Allow to suppress packaging version 0eaaccc

Imagine that you have two packages a, b
in setup.py
a version is 0.0.3
b version is 0.0.6 and depends on a==0.0.3

Dependencies work fine while you are using pip to install package b. But once debianized dependencies get broken with stdeb package a is versioned as 0.0.3-1, but b still depends on a(= 0.0.3). This commit is to allow automatic debianization of packages and keeping their interdependencies intact.

[warvariuc]

Hi, Andrew! Would you please accept this pull request? It has some useful functionality.