review documentation prepare for 1.0.0 release

[jknack]

make sure documentation is up-to-date and fix typo, better description and more examples

[paulovictorv]

I have a question that may be pertinent to this issue: are there any documentation on how to do testing when using Jooby?

I'm specifically asking if there's a standard way to, lets say, inject mocked Jooby Modules or other classes that are `@Inject``ed? If this is a question that is more related to Guice than with Jooby, please forgive me, since I've rarely used Guice before.

@jknack I think I lost my trail of thought while writing. My intention was to propose a more in depth documentation for testing, that included documentation for testing Guice. I can do it if you want. What is your deadline for the 1.0.0 release?