This change adds explicit copyright information too python
files files.  The copyright year used in each case is the
date of the first git commit of each file.

The goal is to allow jsoncpp to be integrated into the
chromium source tree which requires license information in
each source file.

fixes #234

- commit version numbers after release

- added automatic upload of source and documentation tarball on frs.sourceforge.net

- makerelease now decompress the tarball, download and install scons, run scons check on provided platforms, decompress doc tarball and upload the doc on the project web

- added the following step to make_release: fix EOL in distribution source, generate source tarball.
- devtools/ was made into a python module and common utilities are being moved in this module

- prepared tool for eol conversion