Merge pull request #61 from mrmoosehead/master

JSON Date parsing for issue #57
Cleaned up the code a little. Added reminders to implement serialization of Dates to the correct output format (See issue #57 and pull request #61)
Added a fixme on the method parseJSONDate
fixed implicit declaration of a few variables
Turned off use of parseJSONDate until support for different date types is tested and working in two directions (see issue #61).
Some fixed for touch events
Turned off repulsion of links (has some stability issues)
Little tweaks in mass/spring model
Version and date updated
Updated javascript source and version numbers
Fixed issue #67: daterange cannot hande a min or max value of 0 (1-1-1970 00:00)