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/__init__.py

@@ -0,0 +1,11 @@
+"""
+
+Directory for all pen modules.
+If you make a pen, put it here so that we can keep track of it.
+
+
+"""
+
+
+
+