Improved the viewer API
+ Added Server class to handle the formatting of the diverse services watchdogs handle
+ Instead of storing the object with all the fields, now it is a Server class with the dict inside and accessible, and methods for easy formatting strings like memory, load and uptime.
+ The viewer.html example has been updated with this new changes, and it's now easier to read.
+ The server example configuration is modified with only one second interval. Since it's for testing purposes is good as it is.
Bump to 0.2.0