update link to CONTRIBUTING guidelines from README, clarify non-acceptance of PRs

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 Thanks for contributing to libphonenumber!
 
-Please read the following before filing an issue. Note that we are not accepting pull requests at this time.
+Please read the following before filing an issue. **Note that we are _not_ accepting pull requests for metadata updates at this time.**
 
 ## Checklist before filing an issue
 

README.md

@@ -2,6 +2,9 @@
 
 Google's common Java, C++ and JavaScript library for parsing, formatting, storing and validating international phone numbers. The Java version is optimized for running on smartphones, and is used by the Android framework since 4.0 (Ice Cream Sandwich).
 
+# Want to report an issue?
+If you want to report an issue, or to contribute to the project, please read the guidelines [here] (https://github.com/googlei18n/libphonenumber/blob/master/CONTRIBUTING.md) first.
+
 # Highlights of functionality
   * Parsing/formatting/validating phone numbers for all countries/regions of the world.
   * ` getNumberType ` - gets the type of the number based on the number itself; able to distinguish Fixed-line, Mobile, Toll-free, Premium Rate, Shared Cost, VoIP and Personal Numbers  (whenever feasible).
@@ -24,10 +27,6 @@ To include the code in your application, either integrate with Maven or download
 
 http://repo1.maven.org/maven2/com/googlecode/libphonenumber/libphonenumber/
 
-# Contributions
- If you are considering to contribute to the project, please read the instructions [here]
- (https://github.com/googlei18n/libphonenumber/wiki/ContributeToTheProject) first.
-
 # Quick Examples
 Let's say you have a string representing a phone number from Switzerland. This is how you parse/normalize it into a ` PhoneNumber ` object: