Adds initial version of the testbench

Makefile

@@ -1,10 +1,14 @@
 
-vhdl_srcs = float_add.vhd \
-			top_entity_float_add.vhd \
+vhdl_srcs = test/float_add.vhd \
+			fsm_add.vhd \
+			test/float.vhd \
 			test/test_utility.vhd \
-			test/tb_top_entity_float_add.vhd \
+			test/sine.vhd \
+			test/cosine.vhd \
+			test/sine_cosine.vhd \
+			test/tb_fsm_add.vhd \
 
-main = tb_top_entity_float_add
+main = tb_fsm_add
 
 CHECK_RESULTS = true