rename shared expenses -> shared finances, add today's forum post

src/Cookbook.md

@@ -41,7 +41,7 @@ or [add it yourself](https://github.com/plaintextaccounting/plaintextaccounting/
 - [[Mortgages]]
 - [[Multiple currencies]]
 - [[Non-profit accounting]]
-- [[Shared expenses]]
+- [[Shared finances]]
 - [[Taxes]]
 - [[Time tracking]]
 - [[Trip expenses]]

src/Shared-finances.md

@@ -1,4 +1,4 @@
-% Shared expenses
+% Shared finances
 
 - [[Splitting rent and utilities]]
 - [[Splitting the bill]]
@@ -6,3 +6,4 @@
 - [Ledger Practices: Tracking Accounts Jointly and Separately](https://felixcrux.com/blog/ledger-practices-tracking-accounts-jointly-and-separately)
 - [How to use ledger(1) to split shared expenses](https://mumble.net/~campbell/2017/02/26/ledger/HOWTO-sharedexpense)
 - [How to keep control of shared expenses inside marriage?](http://money.stackexchange.com/questions/7101/how-to-keep-control-of-shared-expenses-inside-marriage)
+- [PTA forum: Shared expenses with shared assets](https://forum.plaintextaccounting.org/t/shared-expenses-with-shared-assets/242)