added unit test for Astronomy class
removed unused class property
added unit test for Atmosphere class
added unit test for Condition class
added unit test for Location class
added unit test for Units class
added unit test for Wind class
fixed copy/paste errors in unit tests
added unit test for Feed class
use assertSame() where appropriate
- make feed URL configurable
- remove Feed::WEATHER_API_URL
- remove Feed::registerXpathNamespace()
- remove Feed::WEATHER_API_XPATH_NAMESPACE
- fix XML namespace related error handling
- make Feed::fetchData() throw \RuntimeException as documented and pass previous Exception to \RuntimeException
- add test feeds for unit tests to avoid external API dependency in tests
use test feeds for all unit tests to avoid external API dependency
update version number to 0.3.0
apply pear code style
Merge pull request #4 from Random-Host/unittests

Add unit tests