Exract and display sleep data from Jawbone API.
Each line represents a 24h interval starting at 17h00, each '.' (awake) or 'x' (asleep) represents a 15 min interval. For clarity purposes, a white space has been introduced at midnight and noon.
2014-01-27 Mon ............................ .....xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx..xxxxxxxx.. ....................
2014-01-28 Tue ............................ ........xxx.....xxxxxxxxxxxxxxxxxxxx............ ....................
2014-01-29 Wed ............................ .......xxxxxxxxxxxxxxxxxxxxxxxxxxxxx............ ....................
2014-01-30 Thu ............................ ......xx....xxxxxxxxxxxxxxxxxx.xxxxxxxxx........ ....................
2014-01-31 Fri ............................ .......xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.. ....................
2014-02-01 Sat ............................ ................xxxxxxxxxxxxxxxxxxxxxxxxxxxxx... ....................
2014-02-02 Sun ............................ ................xxxxxxxxxxxxxxxxxxxx............ ....................
2014-02-03 Mon ............................ .....xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx............ ....................
2014-02-04 Tue ............................ .....xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.......... ....................
2014-02-05 Wed ............................ ...xxxxxxxxxxxxxxxxxxxxxxxxxxxxx................ ....................
2014-02-06 Thu ............................ ......xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx..... ....................
2014-02-07 Fri ............................ ................xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ....................
2014-02-08 Sat ............................ ........xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx...... ....................
2014-02-09 Sun ............................ ................................................ ....................