Wrap the currency symbol in html

We use the existing option for :html

Change-Id: Iea95e90f91d91fdaab35f8b79477f6da221d08b1
Create a new option for wrapping currency symbol

It was decided that :html shouldn't be changed to wrap the symbol as
well, but another option should be added

Change-Id: I1d8a40cd2c8e7196c125ec8e7c57e557857504b9
Merge pull request #279 from freerunningtechnologies/wrap_currency_symbol

Wrap currency symbol