html2vimdoc: Bug fix: Reset indent for nested inline nodes (issue #3)

Issue #3 on GitHub:
  https://github.com/xolox/vim-tools/issues/3
html2vimdoc: Bug fix: Improve pruning of empty blocks (issue #3)

Issue #3 on GitHub:
  https://github.com/xolox/vim-tools/issues/3
html2vimdoc: Enable Markdown extension 'fenced_code' by default (issue #3)

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