v0.10.3-preview0002

[v0.10.3-preview0002]

Fixed

• When _Sidebar.md or Footer.md files already exist in the wiki repo,
  the code did not override these files. Updated the code to generate these
  files when they do not exist in the 'WikiSource' folder
  (fixes issue #108).
• When subfolders exist (only for images, not markdown) the Generate_Wiki_Content
  did not copy these files. Updated the code to copy the files recursively
  (fixes issue #109).

Changed

• Moved to the build images windows-latest (fixes issue #112).