v0.7.0

DataFramesMeta v0.7.0

Diff since v0.6.1

Closed issues:

• @by/groupby for Categorical (#149)
• re-factor code (#242)
• Investigate slowdown in blogpost (#244)
• Smarter @eachrow (#249)

Merged pull requests:

• Refactor code (#243) (@pdeffebach)
• Make block (#245) (@pdeffebach)
• Fix typo in manual (#246) (@nalimilan)
• Fix of === after DataFrames PR (#247) (@pdeffebach)
• add @eachrow! (#248) (@pdeffebach)
• Add @byrow attempt 2 (#250) (@pdeffebach)
• add ```julia backticks in readme (#254) (@pdeffebach)
• Bump to 0.7.0 (#255) (@pdeffebach)