github/openhab issue #1013: When the value was an integer and the format was like "%.1f", an exception was thrown

Signed-off-by: Martin <martin+github@planet-renner.net>
github/openhab issue #1013: values like "10.0" did not work with integer formats like "%d"

Signed-off-by: Martin <martin+github@planet-renner.net>
Bug 423545 - Add possiblity to easily switch between different iconsets
Added icon servlet as a replacement for the webapps/images folder

Signed-off-by: Kai Kreuzer <kai@openhab.org> (github: @kaikreuzer)
Merge pull request #23 from planetrenner-martin/decimal-formatter

Flexible formatting of DecimalType
Updated target platform to latest Orbit release

Signed-off-by: Kai Kreuzer <kai@openhab.org>
Bug 423536 - Null check in rule fails
 * Created test suite for NumberExtensions utils
 * Extended NumberExtensions utils with null safe system