Use <PCSC/winscard.h> on Mac OS X

Mac OS X uses PCSC as a framework
See http://ludovicrousseau.blogspot.fr/2010/04/pcsc-sample-in-c.html
Use -framework PCSC on Mac OS X
Fix issue #2: compilation fails on Mac OS X

Compilation fail on Mac OS X:

../src/pcsc-client.cc:313:24: error: array initializer must be an initializer list
                v8::Local<v8::Value> argv[argc] = NULL;
SCARD_AUTOALLOCATE is not supported on Mac OS X

We need to use a double call to SCardListReaders() and allocare the
reader list ourselve.
Mac OS X do not provide PC/SC PnP support

Do not use the special reader name "\\?PnP?\Notification" on Mac OS X.
Find node-pcsc in working directory

Do not need node-pcsc to be installed but use the locally compiled
version.
Increased buffer size.
Merge pull request #12 from greergan/master

Increased buffer size.
Make it work under Linux and Mac OS X
Make it work under Mac OS X
Merge /media/psf/Home/Documents/ef/Produkte/akraja/contrib/node-pcsc

Conflicts:
	src/pcsc-client.cc
Merge errors
Making use of Framework properly
Integrating Windows
Windows: MAX_ATR_SIZE missing
Windows: MAX_ATR_SIZE missing value should be 33
Merge branch 'master' of github.com:hackerhelmut/node-pcsc

Conflicts:
	src/pcsc-client.cc
	src/pcsc-client.h
Merge remote-tracking branch 'origin/mac'

Conflicts:
	binding.gyp
	example2.js
	src/pcsc-client.cc
	src/pcsc-client.h
	src/pcsc-emitter.h
Updating readme to reflect changes
Mac OS X working