Make tracers a separate output

Change-Id: Ifa63f141c1335043dfc77af7a790dc356170c7ea
Updated the time info for output 1 correctly.

Change-Id: I75cb9b06890ad9792e448641da6ba39715849f6d
Added SpyPlotFileSeries reader to deal with the new outputs correctly.

Change-Id: I0f78b36dab38ac6c82d921d9bcf3260928da50a9
Adding specifics for the superclass to work around build errors.

Change-Id: I11276db41c55c18b51d2d518edfa329edbba1548
RequestInformationForInput should be virtual.

Change-Id: I4e7268a6ed330a50c49b7ec7356a1b09d401d162
Fixed up to date with master.

Change-Id: I53ba252ca160835b9bee9a9c2bf3113fd73cc225
Merge topic 'make_tracers_a_separate_output' into next

6cc662e9 Fixed up to date with master.
caddfa44 RequestInformationForInput should be virtual.
a1f00231 Adding specifics for the superclass to work around build errors.
6c2f8baf Added SpyPlotFileSeries reader to deal with the new outputs correctly.
df026ae9 Updated the time info for output 1 correctly.
00e17be1 Make tracers a separate output