Add Hacktoberfest-related information (#2991)

README.md

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+<img width="855" alt="hacktoberfestlogo" src="https://user-images.githubusercontent.com/8431037/31578588-003de9d8-b0d9-11e7-8b67-5a39e7f30485.png">
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 # Welcome to [TechEmpower Framework Benchmarks (TFB)](http://www.techempower.com/benchmarks/) 
 [![Build Status](https://travis-ci.org/TechEmpower/FrameworkBenchmarks.svg?branch=master)](https://travis-ci.org/TechEmpower/FrameworkBenchmarks) 
 [![Documentation Status](https://readthedocs.org/projects/frameworkbenchmarks/badge/?version=latest)](https://readthedocs.org/projects/frameworkbenchmarks/?badge=latest)
 [![Issue Stats](http://www.issuestats.com/github/TechEmpower/FrameworkBenchmarks/badge/issue?style=flat)](http://www.issuestats.com/github/TechEmpower/FrameworkBenchmarks)
 [![Issue Stats](http://www.issuestats.com/github/TechEmpower/FrameworkBenchmarks/badge/pr?style=flat)](http://www.issuestats.com/github/TechEmpower/FrameworkBenchmarks)
 
+If you're new to the project (especially if you're contributing for [Hacktoberfest](https://hacktoberfest.digitalocean.com/)), welcome! Please feel free to ask questions [here](https://github.com/TechEmpower/FrameworkBenchmarks/issues/2978).
+
 This project provides representative performance measures across a wide field of web application frameworks. With much help from the community, coverage is quite broad and we are happy to broaden it further with contributions. The project presently includes frameworks on many languages including `Go`, `Python`, `Java`, `Ruby`, `PHP`, `C#`, `Clojure`, `Groovy`, `Dart`, `JavaScript`, `Erlang`, `Haskell`, `Scala`, `Perl`, `Lua`, `C`, and others.  The current tests exercise plaintext responses, JSON seralization, database reads and writes via the object-relational mapper (ORM), collections, sorting, server-side templates, and XSS counter-measures. Future tests will exercise other components and greater computation.
 
 [Read more and see the results of our tests on Amazon EC2 and physical hardware](http://www.techempower.com/benchmarks/).