Support MSVC 2015

Pending Changes

Submitted Changes:

• "Skip tst_QNumeric::addOverflow() for MSVC2015." 78f9b16d60357b544353cb7d525ffdf56ab72680 (qtbase/5.6, 30.9.2015, 5.6b) https://codereview.qt-project.org/#/c/126757/
• "support Visual Studio 2015" f0467f8b01ba585ef2ee652f618d2badb8ab23b6 (qtcreator/3.4, 15.6.2015, 3.4?) https://codereview.qt-project.org/#/c/114275/

• "Fix CLucene compile error with VS 2015." 78beb4c7d337356d6f478d84b2e7b1fa227a2c3a (qttools/5.5.0, 4.6.2015, 5.5) https://codereview.qt-project.org/#/c/113456/
• "Support MSVC 2015" 540119ba890eb25836980c433d041b687428fdb2 (qtwebkit/5.4, 29.5.2015, 5.4?) https://codereview.qt-project.org/#/c/113273/
• "Fix build with MSVC2015." c095135d047db6190beafab48d083b00ec82f2d8 (qtscript/5.5, 26.5.2015, 5.5) https://codereview.qt-project.org/#/c/112943/
• "QtScript: Fix build with MSVC2015." 1641456366010d2d470e692b80effc601d97fa03 (qt/4.8, 26.5.2015, 4.8.8) https://codereview.qt-project.org/#/c/113103/
• "fix compile error with VS 2015" (accessibility) 11838622e53537dae61245cb51f100cae9f77b9b (qtbase/5.5, 22.5.2015, 5.5) https://codereview.qt-project.org/#/c/111820/
• "MSVC2015: Compile fix (Q_DECL_NOTHROW needs to be present at the definition as well in VS2015)." 7c7c815a1adddfb5a958eefe44724c7395b1a15b (qtbase/5.5, 22.5.2015, 5.5) https://codereview.qt-project.org/#/c/112677/
• "fix ANGLE build with VS2015" 4b7d70886f710767c2b163a08da44d3a7b80479c (qtbase/5.5, 8.5.2015. 5.5): https://codereview.qt-project.org/#/c/111853/
• "Adapt MSVC output parser to MSVC 2015." 8f39e05e40fa1d7fe3ca45942f39c9848f10015b (qtcreator/3.4, 22.5.2015, 3.4.X) https://codereview.qt-project.org/#/c/112929/