Merge pull request #2426 from ningbit/master

Update p.json - Added PxToEm package, converts css px to em and adds comment

repository/p.json

@@ -974,6 +974,16 @@
 				}
 			]
 		},
+		{
+			"name": "PxToEm",
+			"details": "https://github.com/ningbit/sublime_pxtoem",
+			"releases": [
+				{
+					"sublime_text": "*",
+					"details": "https://github.com/ningbit/sublime_pxtoem/tags"
+				}
+			]
+		},		
 		{
 			"details": "https://github.com/biermeester/Pylinter",
 			"labels": ["linting"],