restore and patch installation section of manual

Information about nREPL middleware is needed by the end user.

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-The canonical way to install CIDER is via `package.el` (Emacs's built-in package
-manager), but it can be installed manually or via alternative package managers such
-as `el-get`.
-
-## Prerequisites
-
-You'll need to have Emacs installed (preferably the latest stable
-release). If you're new to Emacs you might want to go through
-[the guided tour of Emacs](https://www.gnu.org/software/emacs/tour/index.html)
-and the built-in tutorial (just press <kbd>C-h t</kbd>).
-
-CIDER officially supports Emacs 24.4+, Java 7+ and Clojure(Script) 1.7+.
-CIDER 0.10 was the final release which supported Java 6 and Clojure 1.5 and 1.6.
-
-You'll also need a recent version of your favorite build tool (Leiningen, Boot
-or Gradle) to be able to start CIDER via `cider-jack-in`. Generally it's a good
-idea to use their latest stable versions.
-
-**CIDER does not support ClojureCLR.**
-
-## Installation via package.el
-
-CIDER is available on the two major `package.el` community
-maintained repos -
-[MELPA Stable](http://stable.melpa.org)
-and [MELPA](http://melpa.org).
-
-You can install CIDER with the following command:
-
-<kbd>M-x package-install [RET] cider [RET]</kbd>
-
-or by adding this bit of Emacs Lisp code to your Emacs initialization file
-(`.emacs` or `init.el`):
-
-```el
-(unless (package-installed-p 'cider)
-  (package-install 'cider))
-```
-
-If the installation doesn't work try refreshing the package list:
-
-<kbd>M-x package-refresh-contents [RET]</kbd>
-
-Keep in mind that MELPA packages are built automatically from
-the `master` branch, meaning bugs might creep in there from time to
-time. Never-the-less, installing from MELPA is a reasonable way of
-obtaining CIDER, as the `master` branch is normally quite stable
-and serious regressions there are usually fixed pretty quickly.
-
-Generally, users of the non-adventurous kind are advised to stick
-with the stable releases, available from MELPA Stable.
-In Emacs 24.4+, you can pin CIDER to always use MELPA
-Stable by adding this to your Emacs initialization:
-
-```el
-(add-to-list 'package-pinned-packages '(cider . "melpa-stable") t)
-```
-
-**CIDER has dependencies (e.g. `queue` & `seq`) that are only available in the
-  [GNU ELPA repository](https://elpa.gnu.org/). It's the only package repository
-  enabled by default in Emacs and you should not disable it!**
-
-## Installation via use-package
-
-`use-package` can be used to install CIDER via the `package.el`'s repositories
-[MELPA Stable](http://stable.melpa.org) and [MELPA](http://melpa.org).
-
-If you wanted to install the version of CIDER which is what is to be found in
-the `master` branch, declare the following in your Emacs initialization file
-(`.emacs` or `init.el`):
-
-```el
-(use-package cider
-  :ensure t)
-```
-
-However, if you wanted to be a bit more conservative and only use the stable
-releases of CIDER, you'd declare the following:
-
-```el
-(use-package cider
-  :ensure t
-  :pin melpa-stable)
-```
-
-After placing one of the above s-expressions, evaluate it, for it to take effect
-by entering: <kbd>C-x C-e</kbd>.
-
-For further configuration options with `use-package`, consult the
-official [use-package repository](https://github.com/jwiegley/use-package).
-
-
-## Installation via el-get
-
-CIDER is also available for installation from
-the [el-get](https://github.com/dimitri/el-get) package manager.
-
-Provided you've already installed `el-get` you can install CIDER with the
-following command:
-
-<kbd>M-x el-get-install [RET] cider [RET]</kbd>
-
-## Manual installation
-
-Alternatively you can simply load CIDER in your Emacs straight from its source
-repo. Assuming you've already obtained the code you should add something like
-this to your Emacs configuration:
-
-```el
-;; load CIDER from its source code
-(add-to-list 'load-path "~/projects/cider")
-(require 'cider)
-```
-
-Just keep in mind that you'll have to manually install all the packages CIDER
-depends on in advance.
-
 ## CIDER's nREPL middleware
 
 Much of CIDER's functionality depends on the presence of CIDER's