slides: Change section and subsection title pages for a table of content status
Makefile: better
slides: fix spelling and add a full tableofcontent page at the beginning
Ignoring .pyg in gitignore
Makefile: uselessely fix a non harmful error
slides: remove useless setbeamertemplate
spelling
slides: move the outertheme definition
slides: improve a joke
slides: add a slide about exceptions
slides: rework function slides and add a flow control subsection (functions, loops, if, exception handling)
Makefile: add a 'slides' phony rule