Type, size and scale can be defined as parameter

Referenced Issue #21 To get more precise latitude, longitude value I
guess we should be able to add type and size defined for creating
latitude and longitude column in Database.

We should be able to define type, size and scale through parameter.
Merge pull request #22 from shahariaazam/master
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/GeocodableBehavior.php