mask input options and sampling options (#252)

* part of #80, support mask input options

* close #188 enhance sampling options
Use a more general sampling strategy interface to describe the
configuration of sampling events collection.

Implemented mousmove, mouse interaction, scroll and input sampling
strategy.

tslint.json

@@ -17,7 +17,8 @@
     ],
     "arrow-parens": false,
     "only-arrow-functions": false,
-    "max-line-length": false
+    "max-line-length": false,
+    "no-empty": false
   },
   "rulesDirectory": []
 }