Added Export Building Tool example

Arranged text so new Export Building image is after description of export Building tool
added exportBuildingExample tool image

updated importBuilding image
Revert "added exportBuildingExample tool image"

This reverts commit 987b9c9ae64b8f45fb9d43929bfd13ff38770a90.
corrected mistake with commits

added exportBuildingExample image and updated importBuilding image
Merge pull request #6 from mattmiller2014/master

Uploaded new image, updated tool image, modified text