* Add new Go application guide
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Address @brian-brazil comments
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Move var() block next to init() function
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Use promauto for example gauge
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Switch example from gauge to counter
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Fix Go code example indentation issue
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Update counter name and description
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Add 'See also' section for other Go libraries
Signed-off-by: lucperkins <lucperkins@gmail.com>

* Fix variable and function names
Signed-off-by: lucperkins <lucperkins@gmail.com>