tweaking wf plot
trying to get setup.py to work
fixes relative import stuff; no need for PYTHONPATH anymore
Improved periodogram calculation plus more options in per

Implementations of three types of periodograms are now available: Lomb-Scargle
using the fast method of Press and Rybicki; Generalized Lomb-Scargle from
Zechmeister and Kürster (2009); Bayesian version of the periodogram as in
Bretthorst (2001), Gregory (2005).
Use of each algorithm is controled by optional flags to the 'per' command.
Fortran extension for BLS plus makefile; correct import is tested
minor moving in periodograms/classes
fixes identation
new subclass of file; counts data lines correctly
adds header skipping option
Merge branch 'feature/FilesWithHeader' into develop
implements glob expansion in read; more colors in plot just in case
minor cleanup
Fixes numpy deprecation warning; recompile extension modules.

Extension modules are a subpackage 'ext' with own makefile for f2py
stuff. Need to check if everything is working correctly.
fix input with more than 3 columns
matplotlib OPEN-specific configuration file
python interpreter information
update ignore rules
Fix issue in genetic algorithm; First implementation of MultiNest.

MultiNest algorithm is included but for now can only be run from a
system call. There is a new 'nest' command to do this. In this way
MPI is enabled, output is redirected to the OPEN prompt and
hopefully I can implement some sort of live plotting in the future.
rectangle-selectable plot (experimental)
New functionality in restrict command: choose by date