Removes non-ascii character from files and bumps version

git-svn-id: https://plugins.svn.wordpress.org/btcquote/trunk@806046 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updates readme.txt title

git-svn-id: https://plugins.svn.wordpress.org/btcquote/trunk@806047 b8457f37-d9ea-0310-8a92-e5e31aec5664