reabsing branch exp-32 onto master for bugfix release preparation
=================================================================
- Fix for https://www.objecthunter.net/jira/browse/EXP-32
- changed call to 'String.isEmpty()' to a length() check in order to fix a MethodNotFoundError in Android < 2.3
- updated changes.xml file for release preparation
[maven-release-plugin] prepare release exp4j-0.3.11
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] rollback the release of exp4j-0.3.11
updated version of site plugin to fix https://cwiki.apache.org/confluence/display/MAVEN/AetherClassNotFound
[maven-release-plugin] prepare release exp4j-0.3.11
[maven-release-plugin] rollback the release of exp4j-0.3.11
[maven-release-plugin] prepare release exp4j-0.3.11
[maven-release-plugin] prepare for next development iteration
merged devel branch for alpha release
added log2, log10 and fixed documentation
added some plugins for release
added bundle plugin
added bundle plugin
fixed version number
fixed execution
removed bundle plugin
added distribution management section
bumped version
fixed site and distri management