add proper path for hardware in travis

Makefile

@@ -1,11 +1,16 @@
 # This stub makefile for a Kaleidoscope plugin pulls in 
 # all targets from the Kaleidoscope-Plugin library
 
+MAKEFILE_PREFIX=keyboardio/avr/libraries/Kaleidoscope-Plugin/build
 UNAME_S := $(shell uname -s)
 
+ifneq ($(wildcard $(shell pwd)/hardware/$(MAKEFILE_PREFIX)), "" )
+ BOARD_HARDWARE_PATH=$(shell pwd)/hardware
+endif
+
 BOARD_HARDWARE_PATH ?= $(HOME)/Arduino/hardware
 ifeq ($(UNAME_S),Darwin)
 BOARD_HARDWARE_PATH ?= $(HOME)/Library/Arduino/hardware
 endif
 
-include $(BOARD_HARDWARE_PATH)/keyboardio/avr/libraries/Kaleidoscope-Plugin/build/*.mk
+include $(BOARD_HARDWARE_PATH)/$(MAKEFILE_PREFIX)/*.mk