Fixed image and added CONTRIBUTING.

Author: dblock

CONTRIBUTING.md

@@ -0,0 +1,90 @@
+Contributing
+============
+
+The https://ruby-grae.github.io site is work of [many contributors](https://github.com/ruby-grape/ruby-grape.github.io/graphs/contributors). You're encouraged to submit [pull requests](https://github.com/ruby-grape/ruby-grape.github.io/pulls) and [propose topics](https://github.com/ruby-grape/ruby-grape.github.io/issues). When in doubt, ask a question in the [Grape Google Group](http://groups.google.com/group/ruby-grape).
+
+#### Fork the Project
+
+Fork the [project on Github](https://github.com/ruby-grape/ruby-grape.github.io) and check out your copy.
+
+```
+git clone https://github.com/contributor/grape.git
+cd grape
+git remote add upstream https://github.com/ruby-grape/ruby-grape.github.io.git
+```
+
+#### Create a Topic Branch
+
+Make sure your fork is up-to-date and create a topic branch for your feature or bug fix.
+
+```
+git checkout master
+git pull upstream master
+git checkout -b my-feature-branch
+```
+
+#### Bundle Install and Run Jekyll
+
+Ensure that you can build the project and run tests.
+
+```
+bundle install
+bundle exec jekyll serve
+```
+
+Navigate to http://localhost:4000.
+
+#### Write Posts
+
+Write posts in [_posts](_posts).
+
+#### Commit Changes
+
+Make sure git knows your name and email address:
+
+```
+git config --global user.name "Your Name"
+git config --global user.email "contributor@example.com"
+```
+
+Writing good commit logs is important. A commit log should describe what you did.
+
+```
+git add ...
+git commit
+```
+
+#### Push
+
+```
+git push origin my-feature-branch
+```
+
+#### Make a Pull Request
+
+Go to https://github.com/contributor/ruby-grape.github.io and select your feature branch. Click the 'Pull Request' button and fill out the form. Pull requests are usually reviewed within a few days.
+
+#### Rebase
+
+If you've been working on a change for a while, rebase with upstream/master.
+
+```
+git fetch upstream
+git rebase upstream/master
+git push origin my-feature-branch -f
+```
+
+Amend your previous commit and force push the changes.
+
+```
+git commit --amend
+git push origin my-feature-branch -f
+```
+
+#### Be Patient
+
+It's likely that your change will not be merged and that the nitpicky maintainers will ask you to do more, or fix seemingly benign problems. Hang on there!
+
+#### Thank You
+
+Please do know that we really appreciate and value your time and work. We love you, really.

README.md

@@ -1,5 +1,6 @@
-![](images/ruby-grape.png)
+![](images/grape.png)
 
 Grape is an opinionated micro-framework for creating REST-like APIs in Ruby.
 This is the Jekyll source for the site at https://ruby-grape.github.io.
 
+Please contribute to this site, see [CONTRIBUTING](CONTRIBUTING.md).