Error propagation figure tuning (#103)

* 'Fixed `gauss_2d_large()`.

`kcsd.validation.csd_profile.gauss_2d_large(seed=63)` does not return
NaN anymore.

`repeatUntilValid()` decorator has been defined for that purpose.

A simple test for the fix provided in the `__main__` section of the module.

Note: The issue has not been solved by fixing distribution of
the `zs` variable in order to provide backward-compatibility.

* 2**32 - 1 included as possible alternative seed in the `kcsd.validation.csd_profile.repeatUntilValid()` decorator.

* Protection of `repeatUntilValid()` decorator against (extremely unlikely) neverending loop of seeds.

* `repeatUntilValid()` decorator reffactored
Seed sequence generation moved to `seedSequence()` generator function.

* `seedSequence()` generator function simplified (the generated sequence has changed though).

* Remove unnecessary imports

According to https://docs.python.org/3/library/builtins.html imports
from `builtsin` are unnecessary. As `builtsin` is Python 3 only,
their removal increases beckward-compatibility of the package.

Fixes #77

* Error Propagation Maps figure

I have included code which generates figure with EPMs (Fig. 7 at the
moment). Also, `colorblind_friendly` module with definition of
colorblind friendly colors is provided, which my code depends on.

* Error propagation maps dependencies reduced

The code of the `colorblind_friendly` module embedded in (copied into)
the script generating error propagation maps.

* Saving of figure of error propagation maps

The figure is saved as "error_propagation.pdf".

* Shabang provided

* Error propagation map figure tuning

Between-panel distance reduced.
Smart precision of ticklabels in both subplots (before only left plot).

* `chmod +x error_propagation.py`

Author: abukaj

figures/kCSD_properties/error_propagation.py

@@ -108,11 +108,11 @@ def _BipolarColormap(name, negative, positive):
 
 FIG_WIDTH = 17.0
 FIG_HEIGHT = 6.0
-FIG_WSPACE = 5.0
+FIG_WSPACE = 2.0
 FIG_TOP = 0.9
 FIG_BOTTOM = 0.15
-FIG_LEFT = 0.05
-FIG_RIGHT = 0.95
+FIG_LEFT = 0.125
+FIG_RIGHT = 0.875
 
 
 def maxabs(values):
@@ -188,8 +188,8 @@ def maxabs(values):
         if x == 0:
             ax.set_ylabel('Y (mm)')
             if y == 2:
-                ax.text(-0.05,
-                        1.15,
+                ax.text(-0.16,
+                        1.16,
                         'A',
                         fontsize=20,
                         weight='bold',
@@ -224,8 +224,10 @@ def maxabs(values):
 
 ax.set_aspect('equal')
 ax.set_xticks(ticks)
+ax.set_xticklabels(ticklabels)
 ax.set_xticks(ticks_minor, minor=True)
 ax.set_yticks(ticks)
+ax.set_yticklabels(ticklabels)
 ax.set_yticks(ticks_minor, minor=True)
 ax.set_ylabel('Y (mm)')
 ax.set_xlabel('X (mm)')
@@ -246,4 +248,4 @@ def maxabs(values):
              #format='%.2g',
              ticks=colorbar_ticks)
 
-fig.savefig('error_propagation.pdf')
+fig.savefig('error_propagation.pdf')