Update README (#520)

- add how to build and use distribution
- fix formatting

Author: dr0i

README.md

@@ -17,19 +17,28 @@ You can either use Metafacture as a stand-alone application or include it as a J
 ## Metafacture as a stand-alone application
 
 If you are only interested in running Flux scripts without doing any Java programming this is the way to go. The instructions assume that you are using a \*nix-like shell. [See more information in the wiki page about Flux](https://github.com/metafacture/metafacture-core/wiki/Flux-user-guide).
+You can `build` the stand-alone application yourself or `download` it.
 
-1. Download the latest distribution package from the [release page](https://github.com/metafacture/metafacture-core/releases). Make sure that you do download a distribution package and *not* a source code package (the file name should include `*-dist*`).
+a) Build
 
-2. Extract the downloaded archive:
+Proceed as described in [Building metafacture-core from source](#build_from_source).
+
+b) Download
+
+Download the latest distribution package from the [release page](https://github.com/metafacture/metafacture-core/releases). Make sure that you do download a distribution package and *not* a source code package (the file name should include `*-dist*`).
+
+Regardless if you've build or downloaded, go on with:
+
+1. Extract the archive:
     ```bash
     $ tar xzf metafacture-core-$VERSION-dist.tar.gz
     ```
     This will create a new directory containing a ready-to-use Metafacture distribution.
-3. Change into the newly created directory:
+2. Change into the newly created directory:
     ```bash
     $ cd metafacture-core-$VERSION
     ```
-4. Run one of the example scripts:
+3. Run one of the example scripts:
     ```bash
     $ ./flux.sh examples/read/marc21/read-marc21.flux
     ```
@@ -52,7 +61,7 @@ Alternatively, you can simply guess the package names from the top-level folders
 </dependency>
 ```
 
-or if Gradle is your build tool of choice use:
+or if Gradle is your buildbuild_from_source tool of choice use:
 
 ```groovy
 dependencies {
@@ -66,25 +75,27 @@ Occasionally, we publish snapshot builds on [Sonatype OSS Repository](https://os
 TODO: Link to getting started tutorial
 -->
 
+
+<a name="build_from_source"></a>
 # Building metafacture-core from source
 
 Building metafacture-core from source is easy. All you need is git and JDK 8:
 
 1. Clone the metafacture-core repository and change into the directory:
+    ```bash
+    $ git clone https://github.com/metafacture/metafacture-core.git
+    $ cd metafacture-core
+    ```
 
-```bash
-$ git clone https://github.com/metafacture/metafacture-core.git
-$ cd metafacture-core
-```
-
-2. Invoke the Gradle wrapper to download Gradle and build metafacture-core (on Windows call `gradlew.bat publishToMavenLocal` instead):
-
-```bash
-$ ./gradlew publishToMavenLocal
-```
-
-Besides the resulting distribution in `metafacture-core/metafacture-runner/build/distributions/` this also provides builds in your local maven repository.
+2. Invoke the Gradle wrapper to download Gradle and build metafacture-core (on Windows call `gradlew.bat publishToMavenLocal` instead) and publish these to your local maven repository:
+    ```bash
+    $ ./gradlew publishToMavenLocal
+    ```
 
+3. Create a distribution if you need one. The resulting distribution can be found in `metafacture-core/metafacture-runner/build/distributions/`:
+    ```bash
+    $ ./gradlew assembleDist
+    ```
 
 See [Code Quality and Style](https://github.com/metafacture/metafacture-core/wiki/Code-Quality-and-Style) on the wiki for further information on the sources.