Fixed a bug displaying the trend arrows incorrectly.
Fixed a bug displaying date/time wrong.

git-svn-id: https://plugins.svn.wordpress.org/meteohub/trunk@952660 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update readme.

git-svn-id: https://plugins.svn.wordpress.org/meteohub/trunk@952667 b8457f37-d9ea-0310-8a92-e5e31aec5664