* Disallow negative row or column count to be inserted

* Disallow zero columns or rows to be inserted as well

* Tests for zero numbers added. Typo fixed.

* Immutable range addresses implementation start

* Immutable range addresses implementation continue

* Range addresses made immutable

* Helper methods for range addresses introduced

* XLRangeRepository introduced

* Range factory introduced

* XLRow and XLColumn constructor calls replaced with factory methods.

* Range shifting with no callback actions implemented

* Ranges shifting improved

* Shifting of worksheet data called explicitly. Shifting of CF ranges fixed

* MergedRanges copying removed as it's performed with rows copying. Minor changes in reference file

* Test fixed (arguments reordered)

* Sharing implemented for tables

* Addresses comparison fixed. Formula shifting fixed

* Setters for FixedRow and FixedColumn removed

* Clean-up

* Flaky test fixed.

* Merge conflicts solved

* Make most of the classes non-disposable

* Clean up

* Merged ranges shifting fixed

* Remove redundant variables, clean up usings.

* Restore usings needed for Release configuration. Remove unused constructor (has been replaced with a method in XLWorksheet).