Jadler can be initialized without explicitly given port.

Closes #21
Merge pull request #23 from Benky/rb-parallel

Jadler can be initialized without explicitly given port.
The latter stub rule takes precedence over the former one. Closes #18
Merge pull request #25 from jandudek/rules-ordering

The latter stub rule takes precedence over the former one. Closes #18
refactoring; tests added, some variable and classes renamed etc.
Merge pull request #26 from jandudek/refactoring2

refactoring; tests added, some variable and classes renamed etc.
Jadler modularization. Closes #30
copyright changed to 2013
Merge pull request #34 from jandudek/modules

Jadler modularization; copyright year fix. Closes #30