Add ability for Core to detect duplicate accounts.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Add duplicate detection for character and key conflicts.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Add duplicate account detection based on IP address.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Remove an unnecessary for loop and change add duplicate to use a kw arg for the IP address argument.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Merge pull request #215 from Acidity/feature/IPchecks

Add duplicate account detection to core.