Add script to install build depend for Debian

Add a script debian/deb-build-dep. The script parses debian/control file
and installs the necessary build time dependent packages to the system:

   $ sudo ./debian/deb-build-dep
Debian package: fontforge conflict fontforge-nox

remove sugguestion to install both.
Default to cubic splines.
If UFO point is smooth, then be more relaxed about what constitutes a smooth point (allow 4 unit difference)
UFO: Load kerns after lookups and skip existing kern pairs
Try to improve guesses regarding curve order. Please enter the commit message for your changes. Lines starting
rename 'fontforgeexe/exelibstamp.pre' and 'fontforge/libstamp.pre'
Simplify making FontForge by using libstamp.c and exelibstamp.c instead

One less step. Previous code converted 'pre' to 'c' versions using sed.
Simplify. Not needed anymore
Merge pull request #1066 from JoesCat/master

Convert libstamp.pre and exelibstamp.pre to static files
Fix quadratic curve implied point logic and possibly SplineFont double free issues.
Oops.
Output qcurve points in u.f.o..
Advance implied point support.
fontforgeexe/wordlistparser.c - warning: unused variables 'ch' 'pt'
Cleanup some more of "warning: unused variables". Remove trailing spaces
Merge pull request #1067 from JoesCat/master

comment-out some variables to reduce number of warnings about unused variables
Update testsuite.at to test python and/or FontForge native script files
Update command-line copyright to display 2014
Attempt to distinguish corner points from smooth points in u.f.o. import.