Update index_es.php
Update activities_es.php

76 activities translated to spannish
76 spanish actividades
Updated lang dropdown
Added 2 activities: Motivational poster (92) and Tell a Story with Shaping Words (93)
Updated language switcher to 93 activities
Added photo for #1
Added photo for #20 and #68
Added Pedro's photos for #12, #20, #63, #68 and #89
Worked on wrong branch 'twallet-master' instead of master :/