Ir esp8266 lib update and code impacts (#235)

* integrate new IRremoteESP8266 lib 2.4.2 and add new protocols

IR_RC6
IR_MITSUBISHI
IR_GICABLE
IR_MITSUBISHI2
IR_LASERTAG
IR_CARRIER_AC
IR_MIDEA
IR_NIKAI
IR_SHERWOOD
IR_DENON
IR_AIWA_RC_T501
IR_JVC

lib/IRremoteESP8266/.gitignore

@@ -0,0 +1,42 @@
+#----------------------------------------#
+# .gitingore for IRremoteESP8266 library #
+#----------------------------------------#
+
+### Files to ignore.
+
+## Editors
+# vi/vim
+**/*.swp
+
+## Build environments
+# Platformio
+**/.pioenvs/
+**/.piolibdeps/
+**/.clang_complete
+**/.gcc-flags.json
+examples/**/lib
+examples/**/.travis.yml
+examples/**/.gitignore
+lib/readme.txt
+lib/googletest/**/*
+
+# GCC pre-compiled headers.
+**/*.gch
+
+# Python compiled files
+**/*.pyc
+
+# Unit Test builds
+test/*.o
+test/*.a
+test/*_test
+
+# Tools builds
+tools/*.o
+tools/*.a
+tools/gc_decode
+
+.pioenvs
+.piolibdeps
+.clang_complete
+.gcc-flags.json