documentation corrections

[dixyushi]

No description provided.

[hohwille]

@dixyushi thanks for your typo fixes also here. This is very valueable especially for stupid typos like licensend. 👍

I rejected very few changes and fixed some things you introduced. If you are interested have a look at the diffs. Also be aware that changing the section titles (e.g. only adding a whitespace) can break links to that section for future changes... However, thanks again for your nice PR. I will merge asap.

[hohwille]

I had quite some merge conflicts with this PR. If possible always base your work on the latest codebase by updating your fork before starting your feature branch. Thanks!

[hohwille]

Travis build failed with this error:

Installing eclipse plugin AnyEditTools from http://andrei.gmxhome.de/eclipse/

org.eclipse.m2e.logback.configuration: The org.eclipse.m2e.logback.configuration bundle was activated before the state location was initialized.  Will retry after the state location is initialized.

No output has been received in the last 10m0s, this potentially indicates a stalled build or something wrong with the build itself.

Check the details on how to adjust your build configuration on: https://docs.travis-ci.com/user/common-build-problems/#build-times-out-because-no-output-was-received

The build has been terminated

As this is not related to this PR and the documentation changes, I will merge as admin.
For the actual error, I will try to restart travis build or find the source of the problem outside of this issue.