Episode 08 (Putting it all together): complete rewrite (#299)

* Rewrite intor about matplotlib

* Explain the bst of both worlds strategy

* Replace matplotlib introduction section by link other packages

* Update objectives and keypoints

* Convert challenge

* Add figures to episode

* Add figures to fig folder

* Subtitle adjustments

* Add section about saving figures, fix #293

* Fix filenames figures

* Fix relative links to figures

* Fix keypoint style

* Use package consistent

* Fix typo on high-quality

* Fix grammar style

* Remove whitespaces at start codeblocks

* Improve naming of figures

* Fix syntax of callout section

* Fix URL formatting

* Remove redundant plot description

* Adapt numpy import to python-novice-inflammation style

* Use full object name for axis

* Fix paragraph text

* Use spaces instead of tabs

* Update matplotlib description

* Update the link Pandas and mpl

* Use relative paths without explicit link to current folder

* Remove explicit reference to mpl object

* Improve language

* Update ipython to jupyter

* Add short intro on interaction mpl and np

* Add space after hashtags

* Fix URL tags

* Fix indendation

* adding language on .show()

* a couple language edits

* image tag

* clarify objectives

* remove 'further'

* Update 08-putting-it-all-together.md

* Update 08-putting-it-all-together.md

* Fix y versus x

* Add plot method to support none-notebook users

* Rephrase the control on axis

* Adapt keypoint

* Use characters instead number

* Use link to data file

* Use method consistently for savefig

* Update 08-putting-it-all-together.md

* Update 08-putting-it-all-together.md

* Update 08-putting-it-all-together.md

* Update 08-putting-it-all-together.md

Author: stijnvanhoey