Fix latest posts date format with distance_of_time_in_words
Fix latest posts date format with distance_of_time_in_words

The Latest Posts on the admin dashboard is showing
"distance_of_time_in_words" as the date of each post, because that
is what is configured as my blog's date format.  Elsewhere, this
date format is treated as a special case rather than a strftime format.

Format the date with display_date_and_time rather than directly calling
strftime on the date and time format of the blog.

waruboy/publify,babaa/foodblog,leminhtuan2015/temona_staging,leminhtuan2015/nginx_capuchino_rails,hmallett/publify,drakontia/publify,hmallett/publify,shaomingtan/publify,shaomingtan/publify,SF-WDI-LABS/publify_debugging_lab,leminhtuan2015/nginx_capuchino_rails,blairanderson/that-music-blog,vivekv009/inuni-blog,totzYuta/coding-diary-of-totz,leminhtuan2015/test_temona,Juuro/publify,Juuro/publify,moneyadviceservice/publify,blairanderson/that-music-blog,solanolabs/publify,seyedrazavi/publify,leminhtuan2015/portal_staging,agiamas/publify,whithajess/publify,agiamas/publify,waruboy/publify,K-and-R/publify,mplstar/blog,SF-WDI-LABS/publify_debugging_lab,vivekv009/inuni-blog,telekomatrix/publify,publify/publify,SF-WDI-LABS/publify_debugging_lab,sf-wdi-25/publify_debugging_lab,leminhtuan2015/nginx_capuchino_rails,framgia/publify,sf-wdi-25/publify_debugging_lab,nguyenduyta/deploy-test,freibuis/publify,faraazkhan/myblog,mozzan/publify,solanolabs/publify,seyedrazavi/publify,waruboy/publify,burakicel/Burakicel.com,mozzan/publify,moneyadviceservice/publify,leminhtuan2015/test_temona,babaa/foodblog,mozzan/publify,telekomatrix/publify,telekomatrix/publify,leminhtuan2015/temona_staging,blairanderson/that-music-blog,nguyenduyta/deploy-test,publify/publify,totzYuta/coding-diary-of-totz,K-and-R/publify,jcfausto/publify,hmallett/publify,solanolabs/publify,leminhtuan2015/portal_staging,faraazkhan/myblog,agiamas/publify,moneyadviceservice/publify,mplstar/blog,framgia/publify,drakontia/publify,leminhtuan2015/portal_staging,seyedrazavi/publify,whithajess/publify,jcfausto/publify,nguyenduyta/deploy-test,vivekv009/inuni-blog,freibuis/publify,sf-wdi-25/publify_debugging_lab,burakicel/Burakicel.com,leminhtuan2015/test_temona,whithajess/publify,mplstar/blog,moneyadviceservice/publify,leminhtuan2015/portal_staging,jcfausto/publify,publify/publify,freibuis/publify,leminhtuan2015/temona_staging,K-and-R/publify,Juuro/publify,leminhtuan2015/nginx_capuchino_rails