New Update 5.2

git-svn-id: https://plugins.svn.wordpress.org/booking/trunk@999190 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix spelling mistakes.

git-svn-id: https://plugins.svn.wordpress.org/booking/trunk@999199 b8457f37-d9ea-0310-8a92-e5e31aec5664