library: add holographlibrary

* All credits to Daniel Nadeau (daniel.nadeau01@gmail.com)

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
shell: add string[] option to getInfo()

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
cpu: add cpu statistics fragment

* Shows the current cpu frequency time usage in a nice pie chart.

* Also displays the values in a list for detailed information.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
main: rename to AeroActivity

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
aero: optimze ram and cpu usage

 * Turning everything [static] final if possible
 * Reworked for-loops to be more efficient
 * Only load shell library in aero activity
 * delete unnecessary code

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
prefs: add legal notices and license

Licensed under Apache v2 with proper credits to library authors.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
prefs: fix actionbar back action

* Now going properly to the previous fragment

Signed-off-by: Blechd0se <alex.christ@hotmail.de>