Removed non-ascii, '&' in file is troublesome\!
Shorten some Spanish command descriptions
Update Foundations slides to match new course order
Fix slide renaming
Correct folderization of Intermediate slides
Add diagrams (unordered) for visauls to new slide structure
Refine slide order by filename values
Add improved generic default opening message
Add better resources to closing
Merge pull request #136 from github/slides-content-update

Align Intermediate with Workbook Topics
Lowercase Kit link
Merge pull request #137 from github/slide-bumpers-update

Slide bumpers update
Revise section titles, tune content exaples
Fine tune slide title styling
Deprecate and blend content into one chapter
Tune titles
Restore Foundations deck, tune chapers

This brings github-foundations.md back after accidental removal
in 5a0cb20 and includes additional foundational slide chapters.
Merge pull request #140 from github/missing-foundations-fix

Restore Foundations deck, tune chapers
Merge pull request #138 from github/slide-format-tuning

Fine tune slide title styling
Merge pull request #139 from github/intermediate-slide-fixes

Slide fixes and tuning