Add directory changes-in-dat-files/apt.dat with two patches for apt.dat

000-general-modify-header.patch:
  indicate that apt.dat has been modified by the FlightGear team

001-CCC5-fix-missing-Unicom-frequency.patch:
  add missing Unicom frequency for CCC5 (Havelock), thanks to wkitty42

The patch files have LF line endings (otherwise this is a mess: some
lines ending with LF and others with CRLF inside the same file). In
order to obtain this, apt.dat has been recoded to LF line endings (Unix
and MacOS X), then the changes have been made, the diff commands run,
and finally the resulting file has been recoded with CRLF line endings
(Windows) before being gzipped and written to FGData. This was done so
in order to preserve compatibility with software that could not handle a
change in $FG_ROOT/Airports/apt.dat.gz's line ending style.

changes-in-dat-files/apt.dat/000-general-modify-header.patch

@@ -0,0 +1,9 @@
+--- apt.dat	2016-12-08 18:43:50.000000000 +0100
++++ apt.dat-000	2016-12-08 18:56:02.310707492 +0100
+@@ -1,5 +1,5 @@
+ I
+-1000 Version - data cycle 2013.10, build 20131335, metadata AptXP1000.  Copyright © 2013, Robin A. Peel (robin@x-plane.com).   This data is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.  You should have received a copy of the GNU General Public License along with this program ("AptNavGNULicence.txt"); if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
++1000 Version - data cycle 2013.10, build 20131335, metadata AptXP1000, further modified by the FlightGear team (cf. <https://sourceforge.net/p/flightgear/fgmeta/ci/next/tree/changes-in-dat-files/apt.dat>).  Copyright © 2013, Robin A. Peel (robin@x-plane.com).   This data is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.  You should have received a copy of the GNU General Public License along with this program ("AptNavGNULicence.txt"); if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ 
+ 
+ 1       15 1 0 VHXX [X] CLOSED Kai Tak

changes-in-dat-files/apt.dat/001-CCC5-fix-missing-Unicom-frequency.patch

@@ -0,0 +1,11 @@
+--- apt.dat	2016-12-08 18:56:02.310707492 +0100
++++ apt.dat-001	2016-12-08 19:01:00.082169377 +0100
+@@ -926129,7 +926129,7 @@
+ 19   45.98520090 -065.30815534 1 WS
+ 19   45.98509598 -065.29620316 1 WS
+ 19   45.98776000 -065.29826459 1 WS
+-51 12320 
++51 12320 CTAF/UNICOM
+ 
+ 1     1000 0 1 3MN7 Haven
+ 100   22.86   3   0 0.25 0 0 0 15   45.49243037 -094.12309108    0.00    0.00 1  0 0 0 33   45.48749963 -094.11966060    0.00    0.00 1  0 0 0