Made FIXED_VIEW_ID public.
Exported org.dawnsci.plotting.views for giving access to ToolPageView
IDs.
Added INFOPIXELTOOL1D_ID, INFOPIXELTOOL2D_ID values by the values in
extensions.
Exported org.dawnsci.plotting.system for accessing preference stores.
Unnoticable typo fix.
Merge branch 'master' of git@github.com:DawnScience/dawn-ui.git