Add PlatformIO Plus info

HISTORY.rst

@@ -7,6 +7,11 @@ PlatformIO 3.0
 3.0.0 (2016-??-??)
 ~~~~~~~~~~~~~~~~~~
 
+* PlatformIO Plus
+
+  + `Unit Testing <http://docs.platformio.org/en/latest/platforms/unit_testing.html>`__ for Embedded
+    (`issue #408 <https://github.com/platformio/platformio/issues/408>`_)
+
 * Decentralized Development Platforms
 
   + Development platform manifest "platform.json" and
@@ -19,9 +24,6 @@ PlatformIO 3.0
   + Embedded Board compatibility with more than one development platform
     (`issue #456 <https://github.com/platformio/platformio/issues/456>`_)
 
-* `Unit Testing <http://docs.platformio.org/en/latest/platforms/unit_testing.html>`__ for Embedded
-  (`issue #408 <https://github.com/platformio/platformio/issues/408>`_)
-
 * Library Manager 3.0
 
   + `Semantic Versioning <http://semver.org/>`__ for library commands and
@@ -41,7 +43,7 @@ PlatformIO 3.0
 * New Intelligent Library Build System
 
   + `Library Dependency Finder <http://docs.platformio.org/en/latest/faq.html#how-works-library-dependency-finder-ldf>`__
-    that interprets C Preprocessor conditional macros with deep search behavior
+    that interprets C/C++ Preprocessor conditional macros with deep search behavior
   + Check library compatibility with project environment before building
     (`issue #415 <https://github.com/platformio/platformio/issues/415>`_)
   + Control Library Dependency Finder for compatibility using

docs/librarymanager/ldf.rst

@@ -133,11 +133,11 @@ This mode can be changed using :ref:`projectconf_lib_compat_mode` option in
 
 .. _ldf_c_cond_syntax:
 
-C Preprocessor conditional syntax
----------------------------------
+C/C++ Preprocessor conditional syntax
+-------------------------------------
 
 In spite of the fact that Library Dependency Finder is written in pure Python,
-it interprets (emulates) `C Preprocessor conditional syntax <https://gcc.gnu.org/onlinedocs/cpp/Conditional-Syntax.html#Conditional-Syntax>`_
+it interprets (emulates) `C/C++ Preprocessor conditional syntax <https://gcc.gnu.org/onlinedocs/cpp/Conditional-Syntax.html#Conditional-Syntax>`_
 (``#ifdef``, ``if``, ``defined``, ``else``, and ``elif``) without calling
 ``gcc -E``. For example,
 

docs/platforms/unit_testing.rst

@@ -14,7 +14,7 @@
 Unit Testing
 ============
 
-.. versionadded:: 3.0
+.. versionadded:: 3.0 (PlatformIO Plus)
 
 `Unit Testing (wiki) <https://en.wikipedia.org/wiki/Unit_testing>`_
 is a software testing method by which individual units of source code, sets