Update Makefile to place .hex files in 'obj' instead of 'obj/main'.

Latest naze binary.

Removing other binaries, git repo isn't really the place to store
binaries and they keep getting in the way.  This is will be kept here
until the configurator is updated.

Makefile

@@ -38,7 +38,7 @@ VALID_TARGETS	 = NAZE NAZE32PRO OLIMEXINO STM32F3DISCOVERY CHEBUZZF3
 ROOT		 = $(dir $(lastword $(MAKEFILE_LIST)))
 SRC_DIR		 = $(ROOT)/src/main
 OBJECT_DIR	 = $(ROOT)/obj/main
-BIN_DIR		 = $(ROOT)/obj/main
+BIN_DIR		 = $(ROOT)/obj
 CMSIS_DIR	 = $(ROOT)/lib/main/CMSIS
 INCLUDE_DIRS = $(SRC_DIR)
 
@@ -282,7 +282,7 @@ endif
 
 
 TARGET_HEX	 = $(BIN_DIR)/$(FORKNAME)_$(TARGET).hex
-TARGET_ELF	 = $(BIN_DIR)/$(FORKNAME)_$(TARGET).elf
+TARGET_ELF	 = $(OBJECT_DIR)/$(FORKNAME)_$(TARGET).elf
 TARGET_OBJS	 = $(addsuffix .o,$(addprefix $(OBJECT_DIR)/$(TARGET)/,$(basename $($(TARGET)_SRC))))
 TARGET_MAP   = $(OBJECT_DIR)/$(FORKNAME)_$(TARGET).map