Usability Improvement:
add menu option "My Palettes" into capture view and about view, so the
user could navigate back to My Palettes view even if they don't know it
is slide-able.
fix the issue that when edit palette data title and back palette card
view the current palette card mighg not the edited one.
rework on export function to support export both the palette card and
the color list
implement the email palette function
change the version name to "alpha 1"
Update ic_launcher
Update version to "alpha 2"
update promotion string