Display Readme.md markdown files in repo browser

If a readme.md file is found in the current directory being used in the
directory browser then the markdown text for that readme.md file will be
rendered.
Fix BrowseTree when path is not a Tree
Merge pull request #184 from latop2604/zipblob

Fix BrowseTree when path is not a Tree
Merge pull request #181 from kengibous/master

Display Readme.md markdown files in repo browser
Markdown text displayed as text instead of code
Fix #172 Set Consolas as default monospace font
Fix #183 Add code formatting settings file
Prepare for version 3.4.3