simplify installation docs for coreless Hive

docs/eHive_install_usage.txt

@@ -38,49 +38,17 @@
 	 - Chart::Gnuplot   (needed for generate_timeline.pl)
 
 
-2. Download and install essential repositories from EnsEMBL @ GitHub
+2. Install the Hive repository from GitHub:
 
-2.1. It is advised to have a dedicated directory where EnsEMBL-related packages will be deployed.
-Unlike DBI modules that can be installed system-wide by the system administrator,
-you will benefit from full (read+write) access to the EnsEMBL files/directories,
-so it is best to install them under your home directory. For example,
+    git clone https://github.com/Ensembl/ensembl-hive.git
 
-	$ mkdir $HOME/ensembl_main
+This will create ensembl-hive directory with all the code and documentation.
 
-It will be convenient to set a variable pointing at this directory for future use:
+You may find it convenient (although it is not necessary) to add "ensembl-hive/scripts"
+to your $PATH variable to make it easier to run beekeeper.pl and other useful Hive scripts.
 
-# using bash syntax:
-	$ export ENSEMBL_CVS_ROOT_DIR="$HOME/ensembl_main"
-		#
-		# (for best results, append this line to your ~/.bashrc configuration file)
-
-# using [t]csh syntax:
-	$ setenv ENSEMBL_CVS_ROOT_DIR "$HOME/ensembl_main"
-		#
-		# (for best results, append this line to your ~/.cshrc or ~/.tcshrc configuration file)
-
-2.2. Change into your ensembl codebase directory:
-
-	$ cd $ENSEMBL_CVS_ROOT_DIR
-
-2.3. Check out the Ensembl repositories by cloning them from GitHub:
-
-    git clone https://github.com/Ensembl/ensembl.git        # core API
-    git clone https://github.com/Ensembl/ensembl-hive.git   # Ensembl Hive
-
-2.4. Add new packages to the PERL5LIB variable:
-
-# using bash syntax:
-	$ export PERL5LIB=${PERL5LIB}:${ENSEMBL_CVS_ROOT_DIR}/ensembl/modules
-	$ export PERL5LIB=${PERL5LIB}:${ENSEMBL_CVS_ROOT_DIR}/ensembl-hive/modules
-		#
-		# (for best results, append these lines to your ~/.bashrc configuration file)
-
-# using [t]csh syntax:
-	$ setenv PERL5LIB  ${PERL5LIB}:${ENSEMBL_CVS_ROOT_DIR}/ensembl/modules
-	$ setenv PERL5LIB  ${PERL5LIB}:${ENSEMBL_CVS_ROOT_DIR}/ensembl-hive/modules
-		#
-		# (for best results, append these lines to your ~/.cshrc or ~/.tcshrc configuration file)
+Also, if you are developing the code and not just running ready pipelines,
+you may find it convenient to add "ensembl-hive/modules" to your $PERL5LIB variable.
 
 
 3. Useful files and directories of the eHive repository.