[ADDED] coin_addresses table and support

* [ADDED] New coin_addresses table to upgrade script and base file
* [MIGRATE] Move coin_address from accounts to coin_addresses table
* [UPDATE] Updated all classes/pages/scripts to use new coin address class
* [UPDATE] DB_VERSION 0.0.12
[FIX] Base Strucutre Import
[FIX] Only move existing addresses
[FIX] FIX import of coin addresses, ignore duplicates
[FIX] Clearing coin address for account
Merge pull request #2243 from MPOS/coin-address-table

[ADDED] coin_addresses table and support