feat(currencyFilter): add numbers after dot count parameter

[allaud]

So we can format currency numbers like this:
expect(currency(1234.5678, "USD$")).toEqual('USD$1,234.57')
expect(currency(1234.5678, "rub", 3)).toEqual('rub1,234.568')
expect(currency(1234.5678, "rub", 0)).toEqual('rub1,234')
The last case is usual for Rubles for example.

There is also a target to remove hardcoded values from source.

[allaud]

@btford how can I pick value from currencySymbols.js in angular-locale_xx.js ?

[allaud]

@btford @IgorMinar got it. Just updated with defaults from currencySymbols.

[IgorMinar]

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