add 0.3.4 change notes

CHANGES.md

@@ -1,22 +1,30 @@
 # Changes
 
+  - 0.3.4
+    - BUGFIX: fix merge confusion to **realy** support `xvfb-run` or other
+      command prefixes to wkhtmltopdf
+    - support explicit deletion of temporary files thanks to
+      [Edipo Vinicius da Silva](https://github.com/edipox)
+    - Improve README
   - 0.3.3
-    -BUGFIX: typo in config/prod.exs
+    - BUGFIX: typo in config/prod.exs
   - 0.3.2
     - support for command prefixes, most notabably **xvfb-run** to let a
       wkhtmltopdf which was compiled without an unpatched version of qt run on
       machines without an x server
     - (add in precompiled, patched binaries for wkhtmltopdf and libjpeg8 that are
       needed to run wkhtmltopdf without xvfb-run)
   - 0.3.1
-    - implement this as proper application, look for executables at startup (and possibly fail on that)
+    - implement this as proper application, look for executables at startup (and
+      possibly fail on that)
     - save paths in a PfdGenerator.Agent
     - make paths configurable in `config/ENV.exs` as well
     - add some tests (Yay!)
     - better README- 0.3.0
 
   - 0.2.0 
     - adding support for PDFTK to create encrypted PDFs
-    - **API-CHANGE** PdfGenerator.generate now returns tuple `{ :ok, file_name }` instead of just `file_name`
+    - **API-CHANGE** PdfGenerator.generate now returns tuple `{:ok, file_name}`
+      instead of just `file_name`
     - Adding some docs, issue `h PdfGenerator` in your iex shell for more info