update release note's issue list according to tracker's release note (http://tracker.zkoss.org/secure/ReleaseNote.jspa?projectId=10101&version=11205)
ZSS-245: fixed the range issue when last cell of row is inside the
deleting range
modify dependency from zss 2.5 to 2.6
ZSS-391: 
 * add test case
 * update release-note (modification at zsscml)
minor revision before releasing freshly
change test file's sheet protection setting to that ZK spreadsheet can
read.