R1186: /biblio/:biblionumber/items can return reserves
Fix subroutine name

get_borrowernumer -> get_borrowernumber
R10: Add PUT user/:user_name
R1464: Adds holdingbranch (Checkout library) to the checkout fields
R10: Assert there is something in data parameter
R1464 [Follow-up]: Adds holdingbranch (Checkout library) to the checkout fields

 - Use branchname instead of branchcode.
Merge remote-tracking branch 'origin/ft/R1464'
Add documentation for POST /user
R1270: Add Suggestions app with run modes for common operations

GET    /suggestions     gets all suggestions
GET    /suggestions/XX  gets suggestion with id XX
POST   /suggestions     create a new suggestion
PUT    /suggestions/XX  modify suggestion with id XX
DELETE /suggestions/XX  delete suggestion with id XX
R1270: Add filters to GET /suggestions
R1270: Add POD documentation for Suggestions module
R1680: Check for item holdable status should check existing holds
Merged from biblibre master