Pick up logback 1.1.1 to fix CP exit if local host name is inaccessible
#1224: Minor help edits
Search help typo
issue #494 convert nan to null in exporttospreadsheet if appropriate + tests
issue #1231 Monkey-patch the bioformats reader to add IM3 + some related problems
issue #1235 mess with data buffer to come up with integer random seed