add 5.2 changelog

Change-Id: Ia2402e40c457270ef6008ea15684a96109329c5c
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

dist/changes-5.2.0

+Qt 5.2 introduces many new features and improvements as well as bugfixes
+over the 5.1.x series. For more details, refer to the online documentation
+included in this distribution. The documentation is also available online:
+
+  http://qt-project.org/doc/qt-5.2
+
+The Qt version 5.2 series is binary compatible with the 5.1.x series.
+Applications compiled for 5.1 will continue to run with 5.2.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+  http://bugreports.qt-project.org/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+****************************************************************************
+*                           General                                        *
+****************************************************************************
+
+Qt Assistant
+------------
+
+
+Qt Designer
+-----------
+
+
+Qt Linguist
+-----------
+
+ - [QTBUG-32196] Fixed search skipping some messages entirely
+ - [QTBUG-32218] Fixed search generally skipping plural forms
+ - Fixed search skipping translator comments in multi-language mode
+ - [QTBUG-14592] Fixed handling of country-less languages like Esperanto
+
+ - lupdate
+
+   * Made the functions lupdate looks for customizable
+   * Made TR_EXCLUDE work for SUBDIRS and #include statements
+   * [QTBUG-14056] Added collection of messages from INSTALL and DEPLOYMENT file lists
+   * [QTBUG-24587] Fixed INCLUDEPATH resolution relative to current project
+   * Fixed INCLUDEPATH erroneously contributing to VPATH for HEADERS
+   * [QTBUG-12948] Fixed handling of PO files with obsolete fuzzy messages.
+     This necessitated the introduction of a new message state, and thus an
+     increment of the TS file format version to 2.1.
+   * [QTBUG-27974] Fixed messages from included sources not being collected
+   * [QTBUG-29131][QTBUG-32725] Fixed handling of incomplete and contradictory meta data
+   * [QTBUG-18890] Fixed meta data changes being ignored
+   * [QTBUG-11866] Fixed too aggressive collection of message meta data
+   * [QTBUG-21876] Fixed numerous C++ parsing issues triggered by comments
+   * [QTBUG-29998] Fixed parsing of tr() inside brackets (used as a hash key)
+   * [QTBUG-9276] Fixed parsing of QT_TR_NOOP() in non-array static initializers
+   * [QTBUG-4393] Fixed parsing of constructors with namespaced parent classes
+   * Fixed long-standing performance regression relating to processing includes
+   * Fixed decoding of qml files in non-UTF-8 locales
+   * Made built-in qmake project parser more accurate and less noisy
+   * Added -pro-debug option equivalent to qmake -d