wrench socket table created without current_timestamp() defaults

[ftrotter]

So it does not automatically set created_at or updated_at correct.y.

[kchapple]

Added userCurerent() function to the schema builder for all sockets and wrench tables so they will be created with current_timestamp() defaults, which allows for automaticallly setting current timestamp on create even when laravel models are not used (#129)"
[master ba6a84c] Added userCurerent() function to the schema builder for all sockets and wrench tables so they will be created with current_timestamp() defaults, which allows for automaticallly setting current timestamp on create even when laravel models are not used

I altered initial migration, so this will only take affect when installing new instances using zermelo:install when there is no _zermelo_config database present.