Remove tuple arguments

This is purely my preference, but I like to avoid tuples as function
args. You can still compose the app using ||> like so:

{ Id = 2; IsVip = false; Credit = 100.}
|> getSpendings
||> tryPromoteToVip

Just a thought :)
Just a few spelling and grammar suggestions
Order of operations means you don't need the parentheses
Revert "Remove tuple arguments"

This reverts commit 16a466d18bf00ad4a56363233324ab1e91707935.
Merge pull request #1 from troykershaw/master

I've only looked at the 'post' code for a few of the modules