Update README

README.md

-# Git introduction course
+# Data management with GitLab
 
-The Git introduction course aims at everyone who works in the Bioinformatics
-field. We cover a *version control system* named *Git*. This system is widely
-used by software developers, but can also be used for project management. By
-keeping track of all versions, history, etc. collaboration with colleagues is
-easy and your analysis will be reproducible.
+This is the website for the course *Data management with GitLab*. This course
+consists of a introduction to working with the [Git](http://git-scm.com/)
+version control system for data analysis and is aimed primarily at researchers
+in the LUMC.
 
-You can find the
-[course website on our wiki](https://humgenprojects.lumc.nl/trac/humgenprojects/wiki/git). This
-repository contains lectures and practicals, written in LaTeX.
+The Git system is widely used by software developers, but can also be used for
+project management. In the LUMC we use [GitLab](https://git.lumc.nl) as a
+collaborative environment on top of Git. By keeping track of all versions,
+history, etc, GitLab makes your projects more reproducible and collaboration
+with colleagues easy.
 
-## Organisation
 
-There is one submodule on which this repository depends.
+## Course dates
 
-- **[presentation](https://git.lumc.nl/j.f.j.laros/presentation)** template
-    for presentations in LaTeX.
+- October 14th, 2013: Git introduction course
+- June 23rd, 2014: Git introduction course
+- **December 1st, 2015: Data management with GitLab** ([preparations](PREPARATIONS.md))
 
-The **website** directory is for storing the compiled presentations,
-handouts and program. A *Trac wiki markup* file contains the website
-content. Uploading, updating and adding attachments can be done easily with
-the [tracwiki](https://pypi.python.org/pypi/tracwiki) program.
+For corresponding snapshots of this repository, see [tags](https://git.lumc.nl/humgen/gitcourse/tags).
 
-## Usage
 
-After cloning this repository, fetch the data from the submodule by issuing
-the following two commands:
+## Using the course materials
 
+There is one [Git submodule](https://git-scm.com/book/en/v2/Git-Tools-Submodules)
+on which this repository depends:
+
+- **[presentation](https://git.lumc.nl/j.f.j.laros/presentation)** template for
+  presentations in LaTeX.
+
+First clone this repository, then fetch the data from the submodule:
+
+    git clone https://git.lumc.nl/humgen/gitcourse.git
+    cd gitcourse
     git submodule init
     git submodule update
 
-([More on Git submodules](http://git-scm.com/book/en/Git-Tools-Submodules))
-
 A new presentation can be added like this:
 
     cd presentation
-    bash mkpres.sh ../mypresentation
+    bash mkpres.sh ../mypresentation
\ No newline at end of file