ISIS-406: pre-release tidy up, also fix to Firefox rendering

* license headers
* RAT exclusions
* fix to Firefox rendering of tables (added a div class='clear')
[maven-release-plugin] prepare release isis-viewer-wicket-1.2.0
[maven-release-plugin] prepare for next development iteration
ISIS-406: bumping pom references to isis-1.2.0
[maven-release-plugin] prepare release isis-viewer-restfulobjects-2.0.0
[maven-release-plugin] prepare for next development iteration
ISIS-406: bumping pom references to isis-1.2.0
ISIS-406: workaround for MRRESOURCES-58
[maven-release-plugin] prepare for next development iteration
ISIS-406: workaround for MRRESOURCES-58
ISIS-406: fixing pom references
[maven-release-plugin] prepare release isis-objectstore-jdo-1.1.0
[maven-release-plugin] prepare for next development iteration
ISIS-406: bumping reference to isis 1.2.0
[maven-release-plugin] prepare release isis-security-shiro-1.1.1
[maven-release-plugin] prepare for next development iteration
ISIS-406: bumping reference to isis 1.2.0
[maven-release-plugin] prepare release isis-security-file-1.0.1
[maven-release-plugin] prepare for next development iteration