move contribute docs into developer docs

doc/developer.rst

@@ -1,6 +1,51 @@
 PV for developers documentation
 =========================================
 
+How to Contribute
+-----------------------------------------
+
+Contributions of any kind (code, documentation, bug reports) are more than welcome.
+
+Coding conventions
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Apart from the basic rules listed below, there is no detailed style guide. In doubt, just look at the existing code.
+
+  - always put braces around if/else/while/for statements.
+  - and indent is two spaces
+  - camelCase your variables and function names
+  - use an _ prefix for your private variables that should not be accessed from outside the class
+  - wrap code at 80 characters
+  - use === and !== for comparisons
+
+Commits
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Use descriptive commit messages using the following format:
+
+ - a short single-line summary, e.g. "add transparency for mesh and line geoms". This line summary should not exceed 60-70 characters.
+ - optionally a block of text that describes the change in more detail, e.g.
+
+      color information is now stored as an RGBA quadruplet to accomodate one 
+      alpha value for each vertex. Coloring operations have grown the ability to 
+      specify alpha values. In case they are omitted, they default to 1.0 
+      (fully opaque) structure.
+
+   the block should be wrapped at 80 characters.
+
+In case you are submitting a larger feature/bugfix, split your work into multiple commits. The main advantage is that your change becomes easier to review.
+
+Before submitting
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Before submitting, or sending the pull request
+
+ - make sure that there are no unrelated changes checked in.
+ - run grunt to check for any coding convention violations and in general make sure that grunt is still able to minify your code without problems.
+ - in case you are adding new functionality, make sure you area adding it to the API documentation
+
+
+
 How to release a new version of PV
 ------------------------------------------