talkatu/talkatu

Make it so that talkatu.h may only be included outside of the Talkatu build.

2020-11-19, Gary Kramlich
211357abb6e8
Make it so that talkatu.h may only be included outside of the Talkatu build.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/233/
# h1
## h2
### h3
#### h4
##### h5
###### h6
plain *emphasis* _emphasis_ ~~**strong**~~ __strong__ `code` plain
[Test link](https://pidgin.im)
`code`
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