Enforce minimum fee for name_update.

Add a mandatory minimum fee for name_update transactions.  Below this
fee, no transactions will be accepted to the memory pool (but they
remain valid).
Don't ask for fee with name_update's.
Merge branch 'master' into update-fee
Merge branch 'master' into update-fee
Merge branch 'update-fee' of github.com:domob1812/huntercoin into update-fee
Set fee to 0.01 HUC.
Change version to 1.00.07.
Merge pull request #28 from domob1812/update-fee

Update fee