Updated GIS install instructions to use placeholders for GIS library versions.

docs/ref/contrib/gis/install/geolibs.txt

@@ -97,16 +97,15 @@ internal geometry representation used by GeoDjango (it's behind the "lazy"
 geometries).  Specifically, the C API library is called (e.g., ``libgeos_c.so``)
 directly from Python using ctypes.
 
-First, download GEOS 3.4.2 from the GEOS website and untar the source
-archive::
+First, download GEOS from the GEOS website and untar the source archive::
 
-    $ wget http://download.osgeo.org/geos/geos-3.4.2.tar.bz2
-    $ tar xjf geos-3.4.2.tar.bz2
+    $ wget http://download.osgeo.org/geos/geos-X.Y.Z.tar.bz2
+    $ tar xjf geos-X.Y.Z.tar.bz2
 
 Next, change into the directory where GEOS was unpacked, run the configure
 script, compile, and install::
 
-    $ cd geos-3.4.2
+    $ cd geos-X.Y.Z
     $ ./configure
     $ make
     $ sudo make install
@@ -158,15 +157,15 @@ reference systems.
 
 First, download the PROJ.4 source code and datum shifting files [#]_::
 
-    $ wget http://download.osgeo.org/proj/proj-4.9.1.tar.gz
-    $ wget http://download.osgeo.org/proj/proj-datumgrid-1.5.tar.gz
+    $ wget http://download.osgeo.org/proj/proj-X.Y.Z.tar.gz
+    $ wget http://download.osgeo.org/proj/proj-datumgrid-X.Y.tar.gz
 
 Next, untar the source code archive, and extract the datum shifting files in the
 ``nad`` subdirectory.  This must be done *prior* to configuration::
 
-    $ tar xzf proj-4.9.1.tar.gz
-    $ cd proj-4.9.1/nad
-    $ tar xzf ../../proj-datumgrid-1.5.tar.gz
+    $ tar xzf proj-X.Y.Z.tar.gz
+    $ cd proj-X.Y.Z/nad
+    $ tar xzf ../../proj-datumgrid-X.Y.tar.gz
     $ cd ..
 
 Finally, configure, make and install PROJ.4::
@@ -188,9 +187,9 @@ supports :doc:`GDAL's vector data <../gdal>` capabilities [#]_.
 
 First download the latest GDAL release version and untar the archive::
 
-    $ wget http://download.osgeo.org/gdal/1.11.2/gdal-1.11.2.tar.gz
-    $ tar xzf gdal-1.11.2.tar.gz
-    $ cd gdal-1.11.2
+    $ wget http://download.osgeo.org/gdal/X.Y.Z/gdal-X.Y.Z.tar.gz
+    $ tar xzf gdal-X.Y.Z.tar.gz
+    $ cd gdal-X.Y.Z
 
 Configure, make and install::
 

docs/ref/contrib/gis/install/spatialite.txt

@@ -43,9 +43,9 @@ just skip this section.
 To install from sources, download the latest amalgamation source archive from
 the `SQLite download page`__, and extract::
 
-    $ wget https://sqlite.org/sqlite-amalgamation-3.6.23.1.tar.gz
-    $ tar xzf sqlite-amalgamation-3.6.23.1.tar.gz
-    $ cd sqlite-3.6.23.1
+    $ wget https://www.sqlite.org/YYYY/sqlite-amalgamation-XXX0000.zip
+    $ unzip sqlite-amalgamation-XXX0000.zip
+    $ cd sqlite-amalgamation-XXX0000
 
 Next, run the ``configure`` script -- however the ``CFLAGS`` environment variable
 needs to be customized so that SQLite knows to build the R*Tree module::
@@ -66,9 +66,9 @@ SpatiaLite library (``libspatialite``)
 Get the latest SpatiaLite library source bundle from the
 `download page`__::
 
-    $ wget https://www.gaia-gis.it/gaia-sins/libspatialite-sources/libspatialite-4.1.0.tar.gz
-    $ tar xaf libspatialite-4.1.0.tar.gz
-    $ cd libspatialite-4.1.0
+    $ wget https://www.gaia-gis.it/gaia-sins/libspatialite-sources/libspatialite-X.Y.Z.tar.gz
+    $ tar xaf libspatialite-X.Y.Z.tar.gz
+    $ cd libspatialite-X.Y.Z
     $ ./configure
     $ make
     $ sudo make install