Include README and LICENSE in distribution

Changed:
- Copy 'README.md' and 'LICENSE' from root into 'dist/' to include when publishing.
- Update Git ignore rules to exclude extraneous files in 'dist/' and any 'node_modules/' in sub-directories.

Author: mcaskill

.gitignore

@@ -1,7 +1,6 @@
-/coverage/
-/dist/*/*
-!/dist/*/package.json
-!/dist/*/tsconfig.json
-/node_modules/
+coverage/
+dist/
+!dist/package.json
+node_modules/
 *.log*
 report.*.json

Makefile

@@ -1,4 +1,4 @@
-publishable: publishable-cjs publishable-esm
+publishable: publishable-cjs publishable-esm copy-files
 	@echo "Done"
 
 publishable-cjs: clean-cjs _publishable-cjs _fix-cjs
@@ -12,6 +12,11 @@ testable-cjs: clean-cjs _testable-cjs _fix-cjs
 
 testable-esm: clean-esm _testable-esm
 
+copy-files:
+	@echo "Copy repository files for publishing"
+	@cp README.md dist
+	@cp LICENSE dist
+
 clean: clean-cjs clean-esm
 	@echo "Done"