- Add options -l/--lazy, -O.

    - Don't over-optimize, check the timestamps of byte-code files.
    - Use the correct name for byte-code files.
    - Add an option -f/--force.
    - Copy stdout/stderr of py_compile processes in case of error.
    - Propagate the exit value of the py_compile processes.
    - Update manual page.
  * Bump depends to require the fixed pycompile for dh_python2 based package
    builds.
  * Don't touch the standard python library in rtupdate scripts.

site-packages directories and use the right interpreter instead of raising
KeyError

it's not in a list of supported Python versions (closes: 600529)

closes LP: #613675

(closes: 590224)

pyclean, pycompile: use .communicate() instead of .wait() to avoid hanging `dpkg -L PACKAGE` in few situations

* add "|| true" in postinst-pycompile

* ignore dh's -O option
* allow multiple -p options
* add -N option

* make sure pycompile binary is available at intall time
* do not require pyclean at uninstall time