ZSS-241 add test app
modify ZSS-241 test app for 3.0.0.RC
fixed ZSS-241 wrap text does not wrap text like excel.
sync solution from 2.6.0
finetune zpoi version dependency
finetune unit test
Merge branch 'ZSS-241-3.0'
update release note for ZSS-241
* Test Case Refine
* Cover More Formula Test
* Cover More Sort Test
* Cover More Range API Test
Merge branch 'RangeAPITest' into 3.0
finetune testcase
refine formula test case. get sheet by name instead of by index
* change order of test methods and divide into Excel's categories.
* move unsupported TIMEVALUE to ignored test
ZSS-439: 
 * add test case
 * update release-note
ZSS-392, ZSS-423:
 * re-design and modify freeze panels control
 * minor fixed
 * add test cases
Merge branch '3.0' of https://github.com/zkoss/zkspreadsheet.git into 3.0
more testcase
* change input of HOUR(), MINUTE(), and VALUE()
* STDEVP is not implemented
* change orders of methods
* remove deprecated test cases
* replace deprecated API
* move classes package "zss.test" under "org.zkoss.zss"
more testcase