Update README.md

Changed the install/develop comments.  Corrected the setuptools usage from the command-line.

README.md

@@ -15,26 +15,26 @@ The project builds only on standard python libraries, libraries from the scipy s
 ### Installing and starting pyFDA
 Download the zip file and extract it to a directory of your choice. Install it either to your `<python>/Lib/site-packages` subdirectory using
 
-    python setup.py -install
+    >> python setup.py install
 
 or run it where you have installed the python source files using (for testing / development)
 
-    python setup.py -develop
+    >> python setup.py develop
 
 In both cases, start scripts `pyfda*` are created in `<python>/Scripts`.
 
 For development, you can also run pyFDA using
 
-    %run -m pyfda.pyfda # IPython or
-    python -m pyfda.pyfda # plain python interpreter
+    In [1]: %run -m pyfda.pyfda # IPython or
+    >> python -m pyfda.pyfda    # plain python interpreter
+
 or files from pyFDA using e.g.
 
-    %run -m pyfda.input_widgets.input_pz # IPython or 
-    python -m pyfda.input_widgets.input_pz # plain python interpreter
+    In [2]: %run -m pyfda.input_widgets.input_pz    # IPython or 
+    >> python -m pyfda.input_widgets.input_pz  # plain python interpreter
 
 
 
-
 ### Why yet another filter design tool?
 * **Education:** There is a very limited choice of user-friendly, license-free tools available to teach the influence of different filter design methods and specifications on time and frequency behaviour. It should be possible to run the tool without severe limitations also with the limited resolution of a beamer.
 * **Show-off:** Demonstrate that Python is a potent tool for digital signal processing applications as well. The interfaces for textual filter design routines are a nightmare: linear vs. logarithmic specs, frequencies normalized w.r.t. to sampling or Nyquist frequency, -3 dB vs. -6 dB vs. band-edge frequencies ... (This is due to the different backgrounds and the history of filter design algorithms and not Python-specific.)