Removed double link, moved contributing ref.

- Contributing ref link was being gratuitously double-linked to, nixed that.
- Changed grammar which is ambiguous between US/UK colloquialism.
- Moved contributing/troubleshooting reference to "installing from git" heading rather than "quickstart" subheading
- Standardised 2-linebreaks between Markdown headings

README.md

@@ -6,16 +6,19 @@ Ghost is a free, open, simple blogging platform that's available to anyone who w
 
 Visit the project's website at <http://ghost.org> &bull; docs on <http://support.ghost.org>.
 
+
 ## Getting Involved
 
 Want to report a bug, request a feature, contribute or translate Ghost? Check out our in-depth guide to [Contributing to Ghost](https://github.com/TryGhost/Ghost/blob/master/CONTRIBUTING.md). We need all the help we can get! You can also join in with our [community](https://github.com/TryGhost/Ghost#community) to keep up-to-date and meet other Ghosters.
 
+
 ## Getting Started
 
 There are a few different ways to install Ghost, take care to use the method which best suits your needs.
 
 **Please note** - the downloadable zip files we provide on [Ghost.org](http://ghost.org/download), the [GitHub releases page](https://github.com/TryGhost/Ghost/releases), and via npm are pre-built packages designed for getting setup quickly. Cloning from the git repository requires you to install several dependencies and build the assets yourself. 
 
+
 ### Install from zip (fastest & best for bloggers)
 
 If you just want to get a Ghost blog running in the fastest time possible, this method is for you.
@@ -33,7 +36,6 @@ For detailed instructions on various platforms, visit the [Ghost Installation Gu
 Check out the [Documentation](http://support.ghost.org/) for more detailed instructions, or get in touch via the [forum](http://ghost.org/forum) if you get stuck.
 
 
-
 ### Install from git
 
 If you're a developer or someone comfortable getting up and running from a `git clone`, this method is for you.
@@ -42,6 +44,8 @@ If you clone the GitHub repository, you will need to build a number of assets us
 
 Please do **NOT** use the master branch of Ghost in production. If you are using git to deploy to production, please use the latest [release](https://github.com/TryGhost/Ghost/releases) or the [stable](https://github.com/TryGhost/Ghost/tree/stable) branch which contains the latest release.
 
+Full instructions & troubleshooting tips can be found in the [Contributing Guide](https://github.com/TryGhost/Ghost/blob/master/CONTRIBUTING.md#working-on-ghost-core).
+
 #### Quickstart:
 
 1. `npm install -g grunt-cli`
@@ -49,10 +53,9 @@ Please do **NOT** use the master branch of Ghost in production. If you are using
 1. `grunt init` (and `grunt prod` if you want to run Ghost in production mode)
 1. `npm start`
 
-Full instructions & troubleshooting tips can be found in the [Contributing Guide](https://github.com/TryGhost/Ghost/blob/master/CONTRIBUTING.md) under the heading "[Working on Ghost Core](https://github.com/TryGhost/Ghost/blob/master/CONTRIBUTING.md#working-on-ghost-core)".
-
 Check out the [Documentation](http://support.ghost.org/) for more detailed instructions, or get in touch via the [forum](http://ghost.org/forum) if you get stuck.
 
+
 ### Install from npm
 
 If you want to build Ghost into a larger node app, or are familiar with using `npm` packages, then this method might be for you.
@@ -66,6 +69,7 @@ Further setup instructions can be found in the [using Ghost as an npm module](ht
 
 Upgrade instructions can be found on the [Ghost Support Site](http://support.ghost.org/how-to-upgrade/)
 
+
 ### Logging in For The First Time
 
 Once you have the Ghost server up and running, you should be able to navigate to `http://localhost:2368/ghost/` from a web browser, where you will be prompted to setup your blog and user account. Once you have entered your desired credentials you will be automatically logged in to the admin area. The setup screen will not be accessible once the process has been completed.