fix($q): call reject() even if $exceptionHandler rethrows

Normally $exceptionHandler doesn't throw an exception.  It is normally
used just for logging and so on.  But if an application developer
implemented a version that did throw an exception then $q would never
have called reject() when converting an exception thrown inside a `then`
handler into a rejected promise.

src/ng/q.js

@@ -215,8 +215,8 @@ function qFactory(nextTick, exceptionHandler) {
             try {
               result.resolve((callback || defaultCallback)(value));
             } catch(e) {
-              exceptionHandler(e);
               result.reject(e);
+              exceptionHandler(e);
             }
           };
 
@@ -224,8 +224,8 @@ function qFactory(nextTick, exceptionHandler) {
             try {
               result.resolve((errback || defaultErrback)(reason));
             } catch(e) {
-              exceptionHandler(e);
               result.reject(e);
+              exceptionHandler(e);
             }
           };