Fixed some inconsistent usage of async states in AsyncImageDisplay.
Upgraded to the latest version of Jacoco.
Adjusted jacoco.gradle to handle file paths in a platform idependent way. Also, from now on, the url to the path of the html will be printed, so that it is convenient to open the file from an IDE (or smart consoles).
Adjusted the indentation in jacoco.gradle (from 2 spaces to 4 spaces)
Specified UTF-8 for source fine encoding in jacoco.