- 2 new packages (image and repository).
- Split big modules into little one under packages.
- Replace full module import by needed objects
- Avoid wildcard imports
- Fix a lot of pylint error and warnings on modules

With the permission of Romain Degez, CTO of Smartjog and Sébastien Luttringer.

Signed-off-by: Sébastien Luttringer <sebastien.luttringer@smartjog.com>

If we have to format (aka interpolatation) we need to be sure this have to be
done in unicode and not in ascii. This avoid unicode error with ascii string
encoded in utf-8.

Example of failure between a string and an object

b = Exception(u"é")
Exception("error: %s" % b)
 => Exception("error: %s" % str(b)
 => UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 0: ordinal not in range(128)

Signed-off-by: Sébastien Luttringer <sebastien.luttringer@smartjog.com>

old command line option are still present but no more in config file
this allow to override easily on command line config parameters

a bug occur with string like "#l##c#R#R#".
This is due to order of processing colors.
Now use re.sub

This allow displaying to be done without coloration

=> Image debian-generic v4 loaded
Error: 'ascii' codec can't encode character u'\xe9' in position 27: ordinal not in range(128)
Traceback (most recent call last):
  File "/usr/bin/is", line 482, in <module>
    error(e)
  File "/usr/bin/is", line 480, in <module>
    args.func(p_main, args)
  File "/usr/bin/is", line 242, in c_list
    img, repo = select_image(o, repoman, args.best)
  File "/usr/bin/is", line 64, in select_image
    return repoman.get(image, version, best)
  File "/usr/lib/python2.6/dist-packages/installsystems/repository.py", line 616, in get
    return repo.get(name, version), repo
  File "/usr/lib/python2.6/dist-packages/installsystems/repository.py", line 399, in get
    pkg = PackageImage(path, fileobj=memfile, md5name=True)
  File "/usr/lib/python2.6/dist-packages/installsystems/image.py", line 458, in __init__
    arrow("Author: %s" % self.author, 1)
  File "/usr/lib/python2.6/dist-packages/installsystems/printer.py", line 107, in arrow
    out(" #light##yellow#=>#reset# %s" % message)
  File "/usr/lib/python2.6/dist-packages/installsystems/printer.py", line 55, in out
    fd.write("%s%s" % (message, endl))
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 27: ordinal not in range(128)

Arrow is now relative this allow to pass context of arrow
no more verbose mode. Soft is verbose except in quiet mode