[Web] Minify css and js via PHP

[Web] Use PT Sans
[Web] Update some libs

data/web/inc/lib/vendor/matthiasmullie/minify/CONTRIBUTING.md

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+# How to contribute
+
+
+## Issues
+
+When [filing bugs](https://github.com/matthiasmullie/minify/issues/new),
+try to be as thorough as possible:
+* What version did you use?
+* What did you try to do? ***Please post the relevant parts of your code.***
+* What went wrong? ***Please include error messages, if any.***
+* What was the expected result?
+
+
+## Pull requests
+
+Bug fixes and general improvements to the existing codebase are always welcome.
+New features are also welcome, but will be judged on an individual basis. If
+you'd rather not risk wasting your time implementing a new feature only to see
+it turned down, please start the discussion by
+[opening an issue](https://github.com/matthiasmullie/minify/issues/new).
+
+Don't forget to add your changes to the [changelog](CHANGELOG.md).
+
+
+### Testing
+
+Please include tests for every change or addition to the code.
+To run the complete test suite:
+
+```sh
+vendor/bin/phpunit
+```
+
+When submitting a new pull request, please make sure that that the test suite
+passes (Travis CI will run it & report back on your pull request.)
+
+To run the tests on Windows, run `tests/convert_symlinks_to_windows_style.sh`
+from the command line in order to convert Linux-style test symlinks to
+Windows-style.
+
+
+### Coding standards
+
+All code must follow [PSR-2](http://www.php-fig.org/psr/psr-2/). Just make sure
+to run php-cs-fixer before submitting the code, it'll take care of the
+formatting for you:
+
+```sh
+vendor/bin/php-cs-fixer fix src
+vendor/bin/php-cs-fixer fix tests
+```
+
+Document the code thoroughly!
+
+
+## License
+
+Note that minify is MIT-licensed, which basically allows anyone to do
+anything they like with it, without restriction.