Update Export to more accurately strip all HTML tags for all fields except HTML and Address (where <br> is replaced with new lines)

git-svn-id: https://plugins.svn.wordpress.org/visual-form-builder/trunk@891935 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix bug with image upload where guid may not be set correctly on some servers

git-svn-id: https://plugins.svn.wordpress.org/visual-form-builder/trunk@891936 b8457f37-d9ea-0310-8a92-e5e31aec5664