Add VSToolkit and AnimatedTransition as git submodules in ext/

Commands used:

  git submodule add \
    "git@github.com:vinisketch/VSToolkit.git" \
    ext/VSToolkit

  git submodule add \
    "git@github.com:dthevenin/AnimatedTransition.git" \
    ext/AnimatedTransition
Remove update_lib.sh script replaced with git submodules
Update example to reference CSS and JavaScript from git submodules
Remove trailing white space
Add datalfow compilation (build method):
- dataflow sort (_sort method)
sort the dataflow and cycle detection
- dataflow data optimization (_data_optimize)
optimize data structure to optimize data progration
Update tests
Add new demo
Update dataflow.asc
Merge branch 'i18n'

Conflicts:
	dataflow.asc
Merge pull request #3 from dthevenin/submodules

Submodules
Update demo to support submodules
add a small test
Add new Clock demo
Update google demo
Update demo
Add submodule update
Fix case issue
Update submodule
Update README.md
Update README.md