add a sweet CircleCI build status badge to readme
add a sweet CircleCI build status badge to readme

Endika/metabase,lukaswelte/metabase,zoowii/metabase,jonasdiel/metabase-ptBR,dashkb/metabase,zoowii/metabase,jonasdiel/metabase-ptBR,blueoceanideas/metabase,jonasdiel/metabase-ptBR,blueoceanideas/metabase,Endika/metabase,jonasdiel/metabase-ptBR,dashkb/metabase,blueoceanideas/metabase,dashkb/metabase,jonasdiel/metabase-ptBR,lukaswelte/metabase,blueoceanideas/metabase,Endika/metabase,Endika/metabase,dashkb/metabase,zoowii/metabase,Endika/metabase,blueoceanideas/metabase,lukaswelte/metabase,lukaswelte/metabase,lukaswelte/metabase,zoowii/metabase,dashkb/metabase,zoowii/metabase