Re-organise the data extraction

[Chunting]

The data exportation is not convient. Re-organise the structure like this: . ├── ... ├── V-REP # Vrep folder │ ├── data │ │ ├── 2018_05_16_13_12_08 # Folder named by time stamp │ │ │ ├── 2018_05_16_14_01_06_Kukaiiwa.iiwa # Kuka binary file │ │ │ ├── 2018_05_16_15_48_49_FusionTrack.flik # Atracsys binary file │ │ │ ├── All the CVS files # Atracsys binary file │ └── ...
└── ...

• [x] Change the code;

• [x] Update the DataRecordingAndPlayback.rst

[Chunting]

The new feature comes out in branch of LowPassFIlter(Pull request #19)