#374 - Change license for OpenSource

[mickmcgrath13]

closes #374

Updates LICENSE to Apache 2.0

Also, for the following files:

• *.js
• *.css
• README.md

Changes License from

Copyright 2020 Extreme Networks, Inc.

Unauthorized copying of this file, via any medium is strictly
prohibited. Proprietary and confidential. See the LICENSE file
included with this work for details.

to

Copyright 2020 Extreme Networks, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

[m4dcoder]

As a representative of Extreme Networks, we have agree with the StackStorm TSC that we are open sourcing st2flow under the Apache 2.0 License. The changes to the license did not get done before the repo was moved to the StackStorm organization. Thank you Mick for making this change on behalf of the team.

[punkrokk]

@mickmcgrath13 would we also add the ST2 contributors line? Or is that the next PR?

[mickmcgrath13]

@punkrokk
#380 (comment)

Can you clarify what you're referring to?

[dzimine]

Thank you!