v2.6.0

• release date 2017.3.24
• add option to hide Readability column on Posts/Pages screens
• update hide email support (see 2.5.5), all tabs have a different class, so need more CSS rules to hide them
• update robots nag
• reintroduce the setting to hide the tagline nag, which was removed in 2.1.1
• modify hide add keyword button in edit Post/Page screens to give remaining tab enough width to show entire text "Enter your focus keyword"
• clarify text Content (Readability)/Keyword (SEO) Score
• edit setting admin columns from 4 to 2 (SEO score and Readability score) and make it radio button option instead of checkboxes; thanks to Curtis for bringing it to our attention
• remove hide about nag as it no longer is a site-wide nag
• update readme.txt