made comments for the nautical package compliant with Go coding style.
fixed constant name to make it compliant with Go coding style
made comments for the convert package compliant with Go coding style.
made comments for the radial package compliant with Go coding style.
fixed constant name to make it compliant with Go coding style
made constants unexported in test files because it makes no sense to have exported constants in a test file
Merge pull request #1 from gilliek/master

Fixed coding style