Add list of third-party software used by DITA-OT

[infotexture]

The DITA-OT docs should include a list of third-party software with version numbers and license information, similar to the list provided for IntelliJ IDEA.

[jelovirt]

DITA-OT 2.4:

Project	Version	License
Ant	1.9.7	[Apache License 2.0]
Apache Commons Codec	1.10	[Apache License 2.0]
Apache Commons IO	2.5	[Apache License 2.0]
Guava	19.0	[Apache License 2.0]
ICU4J	57.1	[ICU License]
Saxon	9.1.0.8	[Mozilla Public License 1.0]
Xerces	2.11.0	[Apache License 2.0]
XML Apis	1.4.01	[Apache License 2.0], [W3C Document License]
XML Resolver	1.2	[Apache License 2.0]

The XML APIs library contains source code for SAX and COM APIs and they have their own licenses.

DITA-OT 2.4 PDF2 FOP:

Project	Version	License
Apache Commons Logging	1.0.4	[Apache License 2.0]
Avalon Framework	4.3.1	[Apache License 2.0]
Apache XML Graphics	2.1	[Apache License 2.0]
Batik	1.8	[Apache License 2.0]
FOP	2.1	[Apache License 2.0]

[ICU License]: http://source.icu-project.org/repos/icu/icu/tags/release-57-1/LICENSE)
[Mozilla Public License 1.0]: https://www.mozilla.org/media/MPL/1.1/index.0c5913925d40.txt)
[Apache License 2.0]: https://www.apache.org/licenses/LICENSE-2.0.txt)
[W3C Document License]: https://www.w3.org/Consortium/Legal/2002/copyright-documents-20021231

[stefan-jung]

• Gradle
• log4j
• Xalan

[jelovirt]

• Gradle is not a dependency, it's just the build tool.
• Log4J is not used
• Xalan is not used

[jelovirt]

Should we split the list to core and plugin dependencies? #120 (comment) has dependencies for both core DITA-OT and PDF2 plugin.

[infotexture]

@jelovirt Thanks for providing the info.

I think splitting the list into core and plugin dependencies makes sense.

[jelovirt]

@infotexture update the table.