Added recommendation to use fully-qualified package in class names (#5)

Author: tsafin

README.md

@@ -33,7 +33,15 @@ If (expression) {
    }
  }
 ```
-* Use the reasonable name convention consistently across whole hierarchy. We recommend to use CamelCase for classes, methods and properties (e.g. `Sample.Person`, `OpenFile`, `LastIndex`, etc.), but smallCamelCase for local variables (e.g. `startDate`, `endDate`), but please be consistent and use local schema if it's different than current recommendation.
+* We recommend to use fully qualified package name of a class (except `%Library` package)
+```
+Set obj = do ##class(Sample.Person).%New(initexpresion)
+```
+instead of
+```
+Set obj = do ##class(Person).%New(initexpresion)
+```
+* In general, use the reasonable name convention consistently across whole hierarchy. We recommend to use CamelCase for classes, methods and properties (e.g. `Sample.Person`, `OpenFile`, `LastIndex`, etc.), but smallCamelCase for local variables (e.g. `startDate`, `endDate`), but please be consistent and use local schema if it's different than current recommendation.
 * We recommend to use `#dim` statement for declaration of local variables types, e.g.
 ```
   #dim array as %ArrayOfDataTypes = ##class(%ArrayOfDataTypes).%New()