Speeds up font compilation by around 200%

Cython is used to compile some hot paths into native Python extensions.
These hot paths were identified through running ufocompile with the hotshot
profiler and then converting file by file to Cython, starting with the "hottest"
paths and continuing until returns were deminishing. This means that only a few
Python files were converted to Cython.

Closes #23
Closes #20 (really this time)

misc/pylib/robofab/pens/quartzPen.py

@@ -0,0 +1,21 @@
+from fontTools.pens.basePen import BasePen
+
+class QuartzPen(BasePen):
+
+	"""Pen to draw onto a Quartz drawing context (Carbon.CG)."""
+
+	def __init__(self, glyphSet, quartzContext):
+		BasePen.__init__(self, glyphSet)
+		self._context = quartzContext
+
+	def _moveTo(self, (x, y)):
+		self._context.CGContextMoveToPoint(x, y)
+
+	def _lineTo(self, (x, y)):
+		self._context.CGContextAddLineToPoint(x, y)
+
+	def _curveToOne(self, (x1, y1), (x2, y2), (x3, y3)):
+		self._context.CGContextAddCurveToPoint(x1, y1, x2, y2, x3, y3)
+
+	def _closePath(self):
+		self._context.closePath()