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Release 0.8 V0.8



See merge request !1

use columns and not only rho and v.

for example given a file with the format:
fr rho v j

one may give:
-c 0 1 2 3
-rs 60 100 300
-re 100 150 400

which means:
- use columns 0, 1, 2, and 3
  - columns 1 from 60 to 100
  - columns 2 from 100 to 150
  - columns 3 from 300 to 400

- xlabel: time or frame
- better file names (no *.txt.txt or *.txt.png)

necessary to compile with VS

- add option fps
- remove option -v
- add default values

os independent

(1)The velocity can be calculated based on pedestrian movement directions, so now different options  ( X, X+,X-,Y,Y+,Y-) can be selected when calculating velocity.
(2)The velocity of moving back  is set as 0 when using options of X+,X-,Y+,Y- during calculation.

The original output of steadystate.py is the lines of files, not the real frame. Now it has been changed.
Fix #46

Besides, add note since I don't understand the meaning of this file

when path of trajectory is not given absolutely, the default location will be the same folder with the inifile.

Script "_Plot_cell_rho.py" and "_Plot_cell_v.py" are modified. Now the geometry is also plotted when plotting voronoi cells.

Improvement: In the past when all the pedestrians are on one straight line, Voronoi diagram can not be generated and Method D can not solved. Now the coordinate of one pedestrian is changed a little bit(0.05m far from the line) place and Voroni diagram can obtained!