talkatu/talkatu

0a9e000e7d0f
Add support for rendering basic HTML in TalkatuHistory.

* Remove the data argument from class methods
* Renamed TalkatuHtmlParser to TalkatuHtmlRenderer
* Created TalkatuHtmlPangoRenderer
* Use the TalkatuMessage::content-type to determine how to render the text in
TalkatuHistory.

Testing Done:
Tested in the demo with a hack for the content type that will be fixed in a later review request.

Reviewed at https://reviews.imfreedom.org/r/403/
---
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AlignTrailingComments: true
AllowAllParametersOfDeclarationOnNextLine: false
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AllowShortCaseLabelsOnASingleLine: false
AllowShortFunctionsOnASingleLine: Empty
AllowShortIfStatementsOnASingleLine: false
AllowShortLoopsOnASingleLine: false
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BinPackParameters: false
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BreakStringLiterals: true
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ContinuationIndentWidth: 8
DerivePointerAlignment: false
ExperimentalAutoDetectBinPacking: false
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IndentPPDirectives: AfterHash
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UseTab: ForIndentation