[evas] Documenting and exemplifying the following:

[evas] Documenting and exemplifying the following:
 - evas_object_text_add
 - evas_object_text_font_get
 - evas_object_text_font_set
 - evas_object_text_font_source_get
 - evas_object_text_font_source_set
 - evas_object_text_glow2_color_get
 - evas_object_text_glow2_color_set
 - evas_object_text_glow_color_get
 - evas_object_text_glow_color_set
 - evas_object_text_outline_color_get
 - evas_object_text_outline_color_set
 - evas_object_text_shadow_color_get
 - evas_object_text_shadow_color_set
 - evas_object_text_style_get
 - evas_object_text_style_set
 - evas_object_text_text_get
 - evas_object_text_text_set

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@61012 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33