Fix: WS in package.xml

- XML indent set to 2 spaces per step.
- Line-breaks at 120 characters.
- Multi-line element values (like "*" (star) lists or changes)
  are starting on their own line, indented.
- Any issue/ticket number is prefixed with "#" (dash) now.

In PHPStorm/IDEA Code Style wording:
====================================

General:
* Right margin (columns): "120"

XML:
* /Tabs and Indents\
    - Use tab characater: *unchecked*
    - Tab size: "2"
    - Indent: "2"
    - Continuation indent: "8"
* /Other\
    - Keep line breaks: *checked*
    - Keep line breaks in text: *checked*
    - Keep blank lines: "2"
    - Wrap Attributes: "Wrap if long"
    - Wrap Text: *checked*
    - Align attributes: *checked*
    * Spaces
        - Around "=" in attribute: *unchecked*
        - After tag name: *unchecked*
        - In empty tag: *checked*
    * CDATA
        - Whitespace around: "Preserve"
        - Keep whitespace inside: *unchecked*
* /Arrangement\
    * Matching Rules
        (1) name: xmlns:.*
Fix: Canonical License URIs, LiceseIDs and Names

Using the canonical URIs and IDs from SPDX. Old
URIs/Names from OSI were ambigous. SPDX links
to the correct OSI URIs.
Fix: Version number and new Lead

There was not 2.0.1 release yet, current changes are all
in 2.0.1 to be released then.

I have taken over the Lead. Old Lead authors said they
are not active any longer.

Also changed in composer.json:

- Canonical description
- Keywords