Update to 0.4.2 and update instructions

Author: gillins

CreateDistribution.txt

@@ -4,13 +4,22 @@ How to create a distribution of PyLidar.
 2. Change the version number in the pylidar/__init__.py. Version number
    is of the form a.b.c, as discussed below. 
    DON'T FORGET TO COMMIT THIS, BEFORE THE NEXT STEP!!!!
-3. Use "hg tag" to add a version number tag, e.g.
-    hg tag pylidar-0.4.0
-4. Create the distribution tarball, using
+3. Push the changes to github with "git push". 
+4. Check out a clean copy of the repository into /tmp or
+   somewhere similar and 'cd' into it.
+5. Create the distribution tarball, using
     python setup.py sdist --formats=gztar,zip
    This creates both a tar.gz and a zip, under a subdirectory called dist
-5. Upload these to bitbucket, under the downloads tab. 
-
+6. Create checksums of each of these, e.g.
+       sha256sum pylidar-1.2.3.tar.gz > pylidar-1.2.3.tar.gz.sha256
+       sha256sum pylidar-1.2.3.zip > pylidar-1.2.3.zip.sha256
+7. Go to the https://github.com/ubarsc/pylidar/releases page, and create a 
+   new release by pressing "Draft a new release". 
+   You should fill in the following:
+       Tag version: pylidar-A.B.C
+       Release Title: Version A.B.C
+       Upload files: Add the tar.gz and zip files, and their sha256 checksum files. 
+       Click "Publish release"
 
 Version Numbers.
 The TuiView number is structured as A.B.C. 

pylidar/__init__.py

@@ -19,5 +19,5 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-PYLIDAR_VERSION = '0.4.1'
+PYLIDAR_VERSION = '0.4.2'
 __version__ = PYLIDAR_VERSION