Windows Version of dump1090

Make the modifications necessary to compile dump1090 for WinXP, Win7 and
hopefully Win8.

The files can be compiled using M$ Visual Studio/C++ 6.0. Due to various
licensing issues, I haven't included the libraries or DLLs. You will
need to locate pthreadVC2.lib and rtlsdr.lib to link the file, install
the zadig drivers to support the dongle, and locate libusb-1.0.dll,
msvcr100.dll, pthreadVC2.dll and rtlsdr.dll.

dump1090.exe will not run on any Windows version prior to XP SP2,
because msvcr100.dll imports several functions from the Windows kernel
that are not available on earlier versions. This means dump1090 won't
work on Win2K.

The major change to the code relates to file handles. The original code
assumes Linux behaviour in that handles are allocated from 0
sequentially upwards. However Windows handles are allocated pseudo
randomly, and handle numbers greater than 1024 would break the code. The
code has therefore been modified to use a linked list of connection
structures, rather than a static array limited to 1024 entries.
BUGFIX : Possible linked list bug
BUGFIX : Windows version HTML Web browser support

Allow connection of a web browser to the Windows version via
http://127.0.0.1:8080
Fixed: now skipping correct number of values in magnitude buffer

Variable j points to the current location in the magnitude vector.
When decoding a message  (MODES_PREAMBLE_US+msglen)*2 is added to j.
In the loop head j is increased by 1, so one value was skipped.
Merge pull request #14 from kopppa91/master

Fixed: now skipping correct number of values in magnitude buffer
Fixed: now skipping correct number of values in magnitude buffer

Variable j points to the current location in the magnitude vector.
When decoding a message  (MODES_PREAMBLE_US+msglen)*2 is added to j.
In the loop head j is increased by 1, so one value was skipped.
Publish Version 1.08.2705.14

A few minor additions and bug fixes as detailed below

1) Additional command line option "--net-buffer <n>" to specify the TCP
output buffer size. Default is n=0, which is 64Kb. Specify a value of n
to increase the buffer size according to  Size  = 64Kb * 2^n, so an n of
1 = 128Kb, n=2 is 256Kb etc. n is limited to 7, so the max size is 8Mb.
This option may assist if you have a high number of aircraft being
received, and an unreliable network connection, or if the receiving end
can be busy for an extended time.

2) Bug fix in ppup1090 which prevented the uploading of valid
ModeA/Squawk codes

3) Bug fix per Markus Grab's commit.
Merge remote-tracking branch 'origin/Debug'
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dump1090.h
	mode_s.c
	net_io.c