fix_sidebar_about_me

fix #125 

about me added more columns then were available, this resolves the issue via moving about me into the sidebar section, also cleans up some mess around it

*    make aboutme.html behave
*    remove undocumented and unnecessary SHOW_ABOUTME
*    whitespace corrections
*    move aside to base.html to make clear that everything there is supposed to be aside without looking into includes

please wait for feedback in #125 before merging