Improved error message for invalid header cell in an Excel sheet.
Fixed off by one in the row number reported.
Merge pull request #664 from dennishendriksen/master

Create JAXBContext only once (story #1962)
Merge pull request #662 from djvanenckevort/master

Improved reporting of errors in uploaded OMX excel sheet.
Merge pull request #665 from dennishendriksen/master

Update maven site plugin to fix NoClassDefFoundError bug
Merge pull request #666 from dennishendriksen/master

Update project reports info plugin 2.6 --> 2.7
Merge pull request #667 from dennishendriksen/master

Update maven war plugin
Merge pull request #668 from dennishendriksen/master

Update sl4j-log4j plugin