Added wire header and its test unit (wire.h, wire.cc and wire_testunit.cc)
Change to makefile. Remove eeprom.o requirements.
remove eeprom_unittest from makefile since this build is only for wire
Minor cosmetic change to wire.h, wire.cc and wire_unittest.cc
Change wire.h TwoWire to Wire
Add more members to wire.h and their implementation in wire.cc
Add more tests to wire_unittest
Merge pull request #10 from littledino2112/wire

Imp.#7 Support Wire lib