Unit Tests - list.t

- Added listIntersect and a Boolean listDiff implementation in main.h.
- Added a set of unit tests for the above.

src/tests/Makefile

@@ -1,6 +1,6 @@
 PROJECT = t.t tdb.t date.t duration.t t.benchmark.t text.t autocomplete.t      \
           config.t seq.t att.t stringtable.t record.t nibbler.t subst.t filt.t \
-          cmd.t util.t color.t
+          cmd.t util.t color.t list.t
 CFLAGS  = -I. -I.. -Wall -pedantic -ggdb3 -fno-rtti
 LFLAGS  = -L/usr/local/lib -lncurses
 OBJECTS = ../TDB.o ../Task.o ../text.o ../Date.o ../Table.o ../Duration.o      \
@@ -78,3 +78,6 @@ util.t: util.t.o $(OBJECTS) test.o
 color.t: color.t.o $(OBJECTS) test.o
 	g++ color.t.o $(OBJECTS) test.o $(LFLAGS) -o color.t
 
+list.t: list.t.o $(OBJECTS) test.o
+	g++ list.t.o $(OBJECTS) test.o $(LFLAGS) -o list.t
+