implementations for platforms with slow floating point

FAX engine yet.

Our main version string is designed for release engineering purposes:
it matches file name conventions used for versioned tarballs and the
versions sort lexicographically while containing all pertinent
information.

With this commit we add in parentheses a more human-friendly rendering
of the version string: we spell out the meaning of each field and
render the datetime in RFC 822 notation.

Showing whether the git repository is clean at the time of build will
be useful, but currently something in our bootstrap/configure/early
make process is causing the tree to look unclean at just the wrong
moment and clean builds are showing up as unclean.

open a door to write video data
so it is possible to record a .fsv file
also possible to write to .mp4 with proper file format support

audio only at this time
video is possible when add a file_write_video interface to core
only tested/working with 8000hz at this time

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Do not build static versions of modules.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

FS-4382 reverse this so you have to enable instead of disable, this patch has been causing srtp issues because the change in ssrc