initial commit
dependency note
GasPump covered by test
adjusted formatting
GasPumps manager
CashDesk & PriceHolder
renamed CashDesk to Statistics, added counters
unfinished
typed prices
thread safe statistics
added jcip annotations
Merge branch 'master' into gasstation-impl
first gas station test
minor improvements
statistics & money
no gas case
too expensive case
state checking after exception
state checking after tooexpensive exception
test refactoring, removed duplication