feat(dl-date-time-input): add date/time input directive

Add a directive that allows date/time input from the user and will also standardize the format of
the input text when used with the date/time picker

BREAKING CHANGE: The DateAdapter interface and implementations have been moved the `core` module.
You will need to update your import statements if you were making use of them.

Author: dalelotts

.gitignore

@@ -3,6 +3,7 @@
 !.vscode/settings.json
 !.vscode/tasks.json
 *.launch
+*.metadata.json
 *.sublime-workspace
 .c9/
 .classpath

ng-package.json

@@ -1,7 +1,7 @@
 {
   "$schema": "./node_modules/ng-packagr/ng-package.schema.json",
   "lib": {
-    "entryFile": "src/lib/dl-date-time-picker/index.ts",
+    "entryFile": "src/lib/index.ts",
     "comments" : "none",
     "licensePath": "LICENSE",
     "umdModuleIds": {