Custom Reports

- Integrated new View in place of Table for all custom reports.
- Implemented legacy field mapping for columns and sort fields.
- Implemented rc.indent.report.
- Implemented rc.row.padding.
- Implemented rc.column.padding.
- Implemented rc.color.label.
- Modified default rc.indent.annotation from 1 to 2.
- Implemented urgency value caching.
- Implemented View truncation by line and row.
- Columns now know which report thy belong to, so they can use the
  rc.report.<report>.dateformat override.
- Assorted bugs remain.

src/sort.cpp

@@ -31,6 +31,7 @@
 #include <Context.h>
 #include <Duration.h>
 #include <Task.h>
+#include <Timer.h>
 #include <text.h>
 
 extern Context context;
@@ -45,6 +46,8 @@ void sort_tasks (
   std::vector <int>& order,
   const std::string& keys)
 {
+  Timer t ("Sort");
+
   global_data = &data;
 
   // Split the key defs.