Merge remote-tracking branch 'origin/normalize_time_semi_merged'

* origin/normalize_time_semi_merged:
  Removed debug messages
  Misc fixes
  fix data path to do better than clt.nc and add units
  fix commit late induced typos
  Add infrastructure needed to interpret, convert and search time.
Fixed blending

If using blend function GL_SRC_ALPHA and GL_ONE_MINUS_SRC_ALPHA
we get color (RGBA) source factor (As,As,As,AS) and color dest
factor ((1,1,1) – (As,As,As), 1 – As). Well the problem is that
this results in resulting alpha for the final pixel < 1.0. Now
we use white background for the body which then shows up through
our GL renering. For example if src alpha is 0.6 then we will get
0.6 * 0.6 + 0.4 * 1.0 = 0.36 + 0.4 = 0.76 as the final pixel alpha
value.
Merge remote-tracking branch 'origin/fix_transparency' into next

* origin/fix_transparency:
  Fixed blending