Update to KaTeX v0.1.1
Merge pull request #1 from Jermolene/master

sync with master
add Subsitutions in WikiText
add Subsitutions in WikiText
Release note update
Add audio parser for handling audio content
fr-FR description of the upgrader module type
fr-FR months are more often displayed in lowercase
Merge pull request #993 from xcazin/new_fr-FR

fr-FR upgrader module description string + change case of long version of month names
Improve docs on TW file format
Removed outdated comment
Merge pull request #992 from Eucaly/variables

add Subsitutions in WikiText
Update cla-individual.md
Docs tweaks
Raise error for missing wiki folders

Only raise the error if the wiki path is explicitly specified on the
command line, avoiding `tiddlywiki —version` raising an error if the
current directory isn’t a wiki folder.

Fixes #990
Docs: Clarify importing simplified TW files
Update macros docs
Docs tweaks

Thanks @xcazin
Merge pull request #994 from Marxsal/patch-2

Update cla-individual.md
Merge pull request #991 from andrey013/ru-RU

Russian translation update