Add "Loggly" support

[kopertop]

I'm working on adding in loggly support, but I'm not sure if I should be working with the v2 branch, or basing this off of the master branch (Is there any reason not to use the git-flow methodology?).

Either way, let me know which would be preferred.

[nlf]

Base it off the v2 branch, and when you've got it ready submit a PR to that branch. I'm slowly porting the existing transports to v2, which provides a much cleaner interface, though it is still in some flux.

Let me know if while you're working on this you have any thoughts on ways to make it friendlier!

[kopertop]

I just created This PR: #34

I've been using it in production for a few weeks now and it seems to work pretty nicely.