Portability

- Clarified the requirements regarding C++11 support, libuuid and gnutls.

DEVELOPER

@@ -1,5 +1,12 @@
 How to Build Taskwarrior
 
+  Satisfy the Requirements:
+    - gcc 4.4 or later, clang 2.9 or later or equivalent. This is because 2.4.1
+      marks the first step towards using modern C++11. Initially this involves
+      only feature N1984.
+    - libuuid
+    - gnutls (optional)
+
   Obtain and build code:
     $ git clone https://git.tasktools.org/scm/tm/task.git task.git
     $ cd task.git

INSTALL

@@ -10,6 +10,13 @@ Pre-requisites
 You will need the CMake build system installed in order to build taskwarrior
 from source.
 
+You will need a C++ compiler that support C++11 N1984, which includes:
+
+  - gcc 4.4   (released 2009-04-21)
+  - clang 2.9 (released 2011-04-06)
+  - uuid lib
+  - gnutls    (optional)
+
 More information on cmake can be obtained at http://cmake.org
 
 It is HIGHLY RECOMMENDED that you build with a library that provides uuid_*