MJPEG Tools Svn

For FreeBSD 'isspace' isn't in the right places (string.h or memory.h or ...) but in ctype.h. Avoid this:
main.cpp: In member function `bool
CmdLineMultiplexJob::ParseWorkaroundOpt(const char*)':
main.cpp:497: `isspace' undeclared (first use this function)
main.cpp:497: (Each undeclared identifier is reported only once for each
function it appears in.)

when building on FreeBSD 5.1

Tidy up the split into the shared lib backed and the command line front-end
File I/O and command line subclasses all now in mpeg2enc.cc

Partition mplex2 into a seperately (dynamically) linkable C++ backend
and a front-end command line wrapper.

vcd-still-size to target-still-size, and autodetect number of CPUs as a default

Range check for act_boost corrected to agree with documentation.

initialize have_png to false so in case libpng is not found the summary does
not have an empty/blank entry instead of saying "false".

fixed the manpage description of the -c option. And a overflow, with the framerate ratios, noticed by Stephen Beahm

This one missed some includes

This file is needd somewhere, too

Account for mpeg2enc and mplex being written in C++ now.