Preparing tofu 1.4.2-a5

[Didou09]

Main changes:

• updated doc
• Fixed path _TFROOT in tutorials units tests
• Added tutorial to plot all configs
• updateversion() now in setup.py and _updateversion.py

[codecov-io]

Codecov Report

Merging #302 into master will decrease coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #302      +/-   ##
==========================================
- Coverage   41.05%   41.04%   -0.02%     
==========================================
  Files          79       79              
  Lines       23468    23464       -4     
==========================================
- Hits         9634     9630       -4     
  Misses      13834    13834

Impacted Files	Coverage Δ
tofu/tests/tests09_tutorials/tests01_runall.py	64.04% <100%> (-1.55%)	⬇️
tofu/version.py	100% <100%> (ø)	⬆️

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[Didou09]

Mzerging because small changes only and urgent