* translation update

* do not show progress info while removing package in cli

pisi package's sha1sum

If build process needs this, we should do it there...

* split returns strings. Make release and build also VersionItems.

In [4]: a = Version("0.5.8-26-10")

In [5]: b = Version("0.5.8.1-30-29")

In [6]: a > b
Out[6]: True
...

was no separation between items. 26 > 1 and a wins.

  the underlying components' packages.

  sudo pisi it --dry-run system
  sudo pisi it --dry-run programming
  

  component.packages - returns this component's packages.
  component.get_packages() - returns also added underlying components' packages.

  this is confusing. unify these with added "walk" parameter to get_packages()
  default get_packages will return this component's packages.