Add proxy exception url patterns to environments
Improve documentroot handling

Documentroot can be set as a list of paths too,
and also as a simple string

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branch [[master]]
add example of pattern use in config yml

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branch [[master]]
Merge pull request #2 from deneslaszlo/master

Some improvement for rest-tool
- Add `proxyException` url patterns to environments.
- Improve `documentRoot` handling.
- Mock server gzip compressing is switched on by default
(server.use(express.compress())).
- Mock server provides responseTime header by default
(server.use(express.responseTime())).
- Autoformatting source files, tuning whitespaces.
- Add some help text to manual_test.sh script.
0.5.1
- Fine tuning the help text to manual_test.sh script.
0.5.2
Update version number on index.html page.