[TYPO3-doc] New 4.5 branch for Core APIs (and Git branches in general)

[François Suter]

> BTW I have just created branch doc_core_api_4-6 and will start working
> on changes for 4.7, which are very few. Then I'll create the 4-7 branch
> and finally move on to 6.0.

And created branch doc_core_api_4-7.

Cheers

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Francois Suter
Cobweb Development Sarl - http://www.cobweb.ch