Added arduino libs

libraries/EnableInterrupt/ReleaseChecklist

@@ -0,0 +1,23 @@
+- examples/test.sh compiles
+- #pragma message in .h file up-to-date?
+- Use Arduino IDE, compile "SimpleDueZero"
+- Tests:
+	- Simple
+	- HiSpeed
+	- HiSpeedAllPins328
+	- AllPins328
+	- HiSpeedAllPins2560
+	- AllPins2560
+	- ATtinyBlink
+- README.md up-to-date?
+- extras/RELEASE_NOTES consistent with README.md?
+- library.properties current?
+- library.json current?
+- Git Tagged?  git tag -a 2.31 -m 'my version 1.4'; git push origin 2.31 OR git push origin --tags
+- Zip file created?  ~/bin/zipei 0.9.0
+- BinTray:
+	- Upload Zip file
+	- Update the downloads area
+- Git commit
+- Push files to GitHub
+- Post to Arduino forums