Build #48:   0.2.5 tracker is valid even if `:actor` is not present, but `:to_s` is stored in `#act... on branch master over 6 years ago

Build #73:   0.2.0 on branch v0.2.0 over 4 years ago

Build #38:   prepare for release on branch v0.2.0 about 7 years ago

Build #41:   remove picturefill dependency (#5) on branch v2.0.0 over 7 years ago

Build #105:   1.0.0 (#2) on branch v1.0.0 about 7 years ago

Build #34:   test against multiple mongoid versions on branch master over 7 years ago

Build #2:   cleanup on branch v0.0.1 about 11 years ago