Mention TravisCI and be explicit about branching

HACKING.md

@@ -1,10 +1,11 @@
 # Development
 
-SSLsplit is being developed on Github as [droe/sslsplit][1].
+SSLsplit is being developed on Github as [droe/sslsplit][1] and uses
+TravisCI for continuous integration.
+[![Build Status](https://travis-ci.org/droe/sslsplit.svg?branch=master)](https://travis-ci.org/droe/sslsplit)
 
 [1]: https://github.com/droe/sslsplit
 
-
 ## Reporting bugs
 
 Please use the Github issue tracker for bug reports.  Including the following
@@ -21,14 +22,17 @@ a git checkout produces no failed unit tests on your system.
 
 ## Contributing patches
 
-For patch submissions, please send me pull requests on Github.  If you have
-larger changes in mind, feel free to open an issue first to discuss
-implications.  If you are interested in contributing and don't know where to
-start, take a look at the [open issues][2].  In particular, [porting features
-over to not yet supported platforms][3] is always very much appreciated.  When
-submitting code, even though it is not a requirement, it is still appreciated
-if you also update the manual page and other documentation as necessary and
-include as many meaningful unit tests for your code as possible.
+For patch submissions, please send me pull requests on Github.  Ideally, you
+fork a separate feature branch off the latest `develop` branch for each of
+your contributions (see below).  If you have larger changes in mind, feel
+free to open an issue first to discuss implications.
+
+If you are interested in contributing and don't know where to start, take a
+look at the [open issues][2].  In particular, [porting features over to not
+yet supported platforms][3] is always very much appreciated.  When submitting
+code, even though it is not a requirement, it is still appreciated if you
+also update the manual page and other documentation as necessary and include
+as many meaningful unit tests for your code as possible.
 
 [2]: https://github.com/droe/sslsplit/issues
 [3]: https://github.com/droe/sslsplit/labels/portability
@@ -44,7 +48,7 @@ Driessen's branching model][4].  The default `master` branch points to the
 latest tagged release, while the `develop` branch is where development happens.
 When preparing a release, there may or may not be a `release/x.y.z` branch off
 `develop`, but in either case, the tagged release is merged back to `master`.
-Larger features are developed in feature branches off the `develop` branch.
+New features are developed in feature branches off the `develop` branch.
 
 [4]: http://nvie.com/posts/a-successful-git-branching-model/