Update CHANGELOG.md and README.md

Author: jonodrew

CHANGELOG.md

@@ -7,15 +7,24 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
-## 6.1.x
+## 7.0.0
 
 ### Changed
 
 - "target profession" and "current profession" have been reverted to "profession" on the Mentee and Mentor object
   respectively. You are welcome to override these in your subclasses, but it's too confusing to have different
   values on the base model
+- the participant.csv file has been changed
 
-###
+### Added
+
+## 6.1.0 2022-05-18
+
+### Added
+
+- there's now two new classes for exporting data. If you're using this library, you can either just use the
+`ExportToSpreadsheet` class to...well...export to a spreadsheet. Alternatively, if you're using email to contact
+successful matches, why not subclass `ExportToEmail` and pass it your favourite email client?
 
 ## 6.0.0 2022-05-14
 

README.md

@@ -70,3 +70,10 @@ if they've already been matched once.
 `Generic`, like `Disqualify`, takes a function with the signature `[[Match], bool]`. It also takes a dictionary,
 like `Grade`, where you define what score to be given to the `Match` if the function evaluates to true, or indeed if
 it evaluates to false!
+
+## Export
+
+There's an inbuilt `ExportToSpreadsheet` which very much does what it says on the tin. Instantiate it with a list of
+`Person` objects and where you want the output to end up and call `export` to do the thing.
+
+You can also subclass `ExportToEmail` for all your email-exporting needs. Or write your own thing entirely!