Bug fixes only, fixes issue #35, issue #36.

Update:
Fixed a bug in the month selector pop-up wherein the month selector was not selecting the correct month in certain cases. See commit 9c8f56c for details.
Note, the github diff is on this commit is showing many changes to the file (possibly due to an OS difference in newline characters?) but the only actual code changes are in AbstractDateModel.setMonth()

Changes:
The today label was not closing the pop-up (like the clear label does),
and it also was not selecting the current date if the date picker was
null. Modified the today label action to fix these things.

Also made minor modifications to a few javadoc entries that were causing
compile errors (failure to compile) under Netbeans and Maven.

Blake