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.
Revert "Small Greek Letter MU and the Scientific Micro Sign look alike"

Although the Micro Sign is based on the Greek lower-case MU, the
Small Greek Letter Mu (u+3bc) and the Micro Sign (u+b5) can differ.
Micro Sign is usually designed in order to correspond Latin letters,
for example it may have serifs. Mu is designed in the style of
classical Greek. See issue #1101 for more info.
Add F/B speed keys for switching layers
Merge pull request #1103 from mhosken/master

Add F/B speed keys for switching layers
Put back code which displays cv->gi bitmap when not using cairo.
A hand made fonts.conf to limit the initial search time.
I've left ~/.fonts there to make it nicer for custom fonts for folks
(takes little time to scan empty dir).

Also some of the X11 paths need to be there for some fonts to be found,
and explicitly the X11/../misc dir to get the little command glyph.
Merge pull request #1106 from monkeyiq/2014jan/issues/1019

A hand made fonts.conf to limit the initial search time.
Dont override the fonts.conf with the one from the system. Use the
hand crafted one that was added instead.
Merge pull request #1107 from monkeyiq/2014jan/issues/1019v2

Dont override the fonts.conf with the one from the system. Use the
Fix for next/prev glyph hotkeys when used after you have switched charview
tab by double clicking a glyph in the fontview.
Merge pull request #1108 from monkeyiq/2014jan/issues/1011

Fix for next/prev glyph hotkeys when used after you have switched charvi...
Add some +/- buttons to allow moving through the wordlist in the charview.
Notice also that popup help has been added to these so new users also get
more of an idea of what is happening and ease into the UI.
Merge pull request #1110 from monkeyiq/2014jan/charview-wordlist-plus-and-minus-buttons

Add some +/- buttons to allow moving through the wordlist in the charview.
Merge pull request #1112 from blipvert/fixes/28

Put back code which displays cv->gi bitmap when not using cairo.
issues/1109: now in the metrics view too.
Merge pull request #1113 from monkeyiq/2014jan/issues/1109

issues/1109: now in the metrics view too.
Fix usage of mkdir with MinGW
Remove MINGW32 specifics for FreeType debugger includes
Include Windows header on Windows