ND2: reset series count before allocating offset array

This prevents extra memory from being used if the series count was too
high.  See http://lists.openmicroscopy.org.uk/pipermail/ome-users/2014-September/004699.html
KodakReader: Fix findString()

Function now correctly reports strings starting within the endmost (filesize mod 8192) bytes
KodakReader: Add fileinfo metadata support

Export 'DLFi'-tagged text as global metadata string 'FileInfo'
Merge pull request #1353 from seb-berger/kodak-reader

KodakReader: Bugfix and file info metadata
Merge pull request #1351 from melissalinkert/nd2-memory

ND2: reset series count before allocating offset array