Add support for Switzerland's CSIF funds#69

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c-vigo wants to merge 6 commits intobeancount:masterfrom c-vigo:csif

+293-1

Commits on Mar 22, 2022

Commits on Sep 1, 2022

Improve date filtering to avoid "finding" the file date instead of the price date
c-vigo
committed

Commits on Sep 5, 2022

Fix bug in last commit
c-vigo
committed

Commits on Jan 3, 2023

add price source for SwissFundData website
c-vigo
committed