Time Library added to Playground

Actually, I just figured out what I was doing wrong.

When I installed Time library at my libraries directory, I did it like this:

I unzipped Time.zip file at my libraries directory, so it created a new directory, 'Time'.

So the result was like this:

~/Documents/Arduino/libraries/Time/DS1307RTC
~/Documents/Arduino/libraries/Time/Time
~/Documents/Arduino/libraries/Time/TimeAlarms

Instead, what I should have done was to move the contents of top-level 'Time' directory to my libraries directory, like this:

~/Documents/Arduino/libraries//DS1307RTC
~/Documents/Arduino/libraries/Time/
~/Documents/Arduino/libraries/TimeAlarms

After making this adjustment, I am able to compile the examples that came with Time library. Hope other people may find it useful (or has everyone already figured this out?).