Merge branch 'master' into gh-pages
Merge branch 'release/0.5.0'
Merge branch 'gh-pages'
Merge branch 'release/0.5.1'
Merge branch 'release/0.5.2'
Merge branch 'release/0.5.3'
Merge branch 'release/0.5.4'
Bump version number to 0.5.5
Merge branch 'hotfix/0.5.5' into develop