factor out a private method to check if any function tracker is currently
active in the current event
add a cython decleration for the cythonized FunctionMonitor
add a cython version for the FocusedFunctionMonitor
add a benchmark script for focused monitors
remove time_per_record since it does not make real sense
minor fixes in the copyright header
Update focused_function_monitor.pyx
Update test_focused_cfunction_monitor.py
Update focused_monitors.py
special case for python 2.6
Merge remote-tracking branch 'origin/cython-focused-function-monitor' into cython-focused-function-monitor

* origin/cython-focused-function-monitor:
  Update focused_monitors.py
  Update test_focused_cfunction_monitor.py
  Update focused_function_monitor.pyx
Merge pull request #58 from enthought/cython-focused-function-monitor

Cython focused function monitor