refactor code and add more modules

refactor code, rename category to module
adjust options and update README
dispatch /var/log/syslog.1 when extracting log
add more modules, background, bluetooth, display
add timestamp for temporary folder
speed up the process to extract syslog
reduce time when execute lshw multiple times

Change-Id: I7ac1c40da0890cc4e4ac5d3aa1b25c6cab63b22f