Add support for HTML template files (.htm)
Add parameter UseHtmlTemplates to switch from DOCX to HTML template handling
Consider images in .docx templates with different text wrapping setting (Shapes for "in line with text" and InlineShapes for all other text wrapping settings)
Update readme
Change template path structure
Update templates
Check existence of signature file before trying to set Outlook web signature
Raise version to 1.6.0