html2vimdoc: Make sure code fragments are clearly marked (issue #3)

Issue #3 on GitHub:
  https://github.com/xolox/vim-tools/issues/3
html2vimdoc: Improve inline documentation
html2vimdoc: Support for italic/emphasis and bold/strong (issue #3)

Issue #3 on GitHub:
  https://github.com/xolox/vim-tools/issues/3
html2vimdoc: Add -v, --verbose option & high level logging (issue #3)

Issue #3 on GitHub:
  https://github.com/xolox/vim-tools/issues/3