optimized paddings in divs of stackr-header
fixed: after adding Comment -> do not toggle class of button 'filter task' when buttons not active
fixed typo
aligned Stackr title and Comments sections: padding in comments-wrapper -> 50px
begun writing a general description. installation instructions missing
renamed css class: element-hidden -> element invisible
implemented show dates-button -> shows all comment dates on click
added browser icon
fixed: show Comment dates also after clicking on see more-button
resized to 16x16 px
added icons for function 'filter tasks' and 'show dates'
replaced buttons by images
moved buttons to stackr-operations section
changed size to 45x43 px
replaced pin image by bookmark
replaced pin image by bookmark
renamed css class: favoredIcon -> stackr-bookmark
replaced code toggeling image by function used for filter tasks and show dates
added padding top and left