Merge pull request #1 from tomchristie/master

Merge updates from origin
Added option clear_site_dir to removed old files from site directory
Merge branch 'master' of github.com:devbliss/mkdocs

merged with master
merged before pull request to sync with upstream
Fixed syntax error
Fixed another Python 3 syntax error
Fixed whitespace issues reported by flake8 test
Updated docs for multiple theme directories

Originally changed in 8f3c2b0.
Remove Lorem ipsum
Add BSD license file
Add a note about supported Python versions
Fix RTD theme toc when pages don't have children.
Link to RTD footer
Merge pull request #157 from d0ugal/LICENSE

Add BSD license file
Merge pull request #160 from ericholscher/fix-rtd-unnested

Fix RTD theme toc when pages don't have children.
Merge pull request #158 from d0ugal/documentation-updates

Documentation updates
Merge remote-tracking branch 'upstream/master' into feature/clear-site-directory-option

Synced with upstream
Removed clear_site_dir option and made it the default behaviour
Fixed bug in clear_directory (fails if directory does not exist)
Removed exception handling as suggested by d0ugal