We have a couple of helper functions redefined in multiple spec files.
This commit introduces a `shared.spec` that provides such functions.
The file is then imported in other spec files, so we can make use of the
functions there.
Closes#87
This commit introduces the internal accounting logic for accrueing
multiplier points, that will later be used to determine how many
experience points an account is eligible to.
The majority of the work here was done by @3esmit.
r4bbit
Nurit Dor