Added `gfm-insert-code-block`. Inserts the \`\`\`lang\n|\n\`\`\` block or wraps active region.
Added an optional prefix argument to markdown-follow-wiki-link-at-point. If called with C-u, the file is opened on (other-window 1)
Merge pull request #4 from Fuco1/gfm-code-block

Added `gfm-insert-code-block`. Inserts the ```lang\n|\n``` block
Merge pull request #6 from Fuco1/followlink

Open markdown-follow-wiki-link-at-point in other window