Refactoring

Duplication of MToolsXMLExcelReport class (issue #2)
Refactoring

Separation of XMLSS-related functionality (issue #2)
Refactoring

Separation of XMLSS-related functionality (issue #2).
Refactoring

Code for backward compatibility with version 1.0 (issue #2)
Refactoring

Code style and best practices (issue #2)
Refactoring

Separation of target file check and creation, more clear method names
(issue #2)
File write reimplemented

Write to target document file reimplemented via CLR interop (issue #2)
Encoding selection

Support of format-specific encodings (issue #2)