Merge pull request #1251 from rrthomas/master

Tidying up the build system
Merge pull request #1254 from rrthomas/master

Fix linking of libggc_veener.la, and add more needed gnulib modules
osx: the build is now not liking g_hash_table_new_full() on osx with a GC error. Move
     to glib explicit memory alloc for the hash table values.
Merge pull request #1255 from monkeyiq/2013march/collab-glib-bdw-update1

osx: the build is now not liking g_hash_table_new_full() on osx with a GC error.
Fixed implicit function declaration warnings.
Fix crash in matrixedit and help contextual lookup editors a lot
Add a new named pipe to allow other processes to send python scripts
to fontforge for execution. This file is owned by and only writable by
the user. Also some new code to track the last active fontview and
charview to help code that needs context but does not explicitly track
it, for example, the code that runs a python script from the named
pipe wants to pass the active char to that script so it can perform
something on that char.
Fix AnchorClass output to sfd for anchor classes with no lookups
Merge pull request #1269 from monkeyiq/2013march/python-pipe

Add a new named pipe to allow other processes to send python scripts to fontforge for execution.
issues/1264, fix for wandering last point on forced open spline path while reading from SFD.
Merge pull request #1270 from monkeyiq/2013march/issues/1264

issues/1264, fix for wandering last point on forced open spline path while reading from SFD.
Make sure fcntl.h is included.

Needed for declaration of open(), plus definitions for O_RDONLY and O_NDELAY.
Merge pull request #1272 from blipvert/fixes/29

Make sure fcntl.h is included.
Require Python >= 3
Fix lots of compiler warnings

Mostly unused variables and parameters
.dir-locals.el: actually make it all work

Since I use dtrt-indent, I hadn't noticed this wasn't working at all;
sorry. Actually tested now.
configure.ac: fix some whitespace in generated config.h
parsepdf.c: fix a comment typo
psread.c: fix most compiler warnings
namelist.c: fix an annoying number of compiler warnings about const