Updated ChangeLog for versions 1.7.2 - 1.7.5.

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 Not all changes are documented here. In particular, new features, user-oriented fixes, options, command-line parameters, usage changes, deprecations, significant internal modifications and optimizations etc. generally deserve a mention. To examine the full set of changes between versions, visit the link to full changeset diff at the end of each section.
 
+Current trunk code
+------------------
+ - To see a list of commits that in the active development branch 'incoming', which have not yet been packaged in a release, see
+    https://github.com/kripken/emscripten/compare/1.7.5...incoming
+
+v1.7.5: 11/13/2013
+------------------
+ - Fix issues with the built-in C++ function name demangler.
+ - Full list of changes: https://github.com/kripken/emscripten/compare/1.7.4...1.7.5
+
+v1.7.4: 11/12/2013
+------------------
+ - Fixed issues with BSD sockets code and SDL joystick implementation.
+ - Full list of changes: https://github.com/kripken/emscripten/compare/1.7.3...1.7.4
+
+v1.7.3: 11/12/2013
+------------------
+ - Added support for generating single-precision floating point instructions.
+    - For more information, read https://blog.mozilla.org/javascript/2013/11/07/efficient-float32-arithmetic-in-javascript/
+ - Made GLES2 support library more spec-conformant by throwing fewer exceptions on errors. Be sure to build with -s GL_ASSERTIONS=1, remember to use glGetError() and check the browser console to best detect WebGL rendering errors.
+ - Converted return value of emscripten_get_now() from float to double, to not lose precision in the function call.
+ - Added support for joysticks in SDL via the Gamepad API
+ - Full list of changes: https://github.com/kripken/emscripten/compare/1.7.2...1.7.3
+ 
+v1.7.2: 11/9/2013
+------------------
+ - The compiler now always generates a .js file that contains the generated source code even when compiling to a .html file.
+    - Read https://groups.google.com/forum/#!topic/emscripten-discuss/EuHMwqdSsEs
+ - Implemented depth+stencil buffer choosing behavior in GLUT, SDL and GLFW.
+ - Fixed memory leaks generated by glGetString and eglGetString.
+ - Greatly optimized startup times when virtual filesystems with a large amount of files in them.
+ - Added some support for SIMD generated by LLVM.
+ - Fixed some mappings with SDL keyboard codes.
+ - Added a new command line parameter --no-heap-copy to compiler and file packager that can be used to optimize VFS memory usage at startup.
+ - Updated libcxx to revision 194185, 2013-11-07.
+ - Improvements to various library support. 
+ - Full list of changes: https://github.com/kripken/emscripten/compare/1.7.1...1.7.2
+
 v1.7.1: 10/24/2013
 ------------------
  - Remove old call to Runtime.warn in file packager code