Squashed 'thirdparty/rapidjson/' changes from c4a1566..98f8790

98f8790 Update tutorial.md
a2354cd Merge pull request #154 from gadomski/doc-typo
c7efabc Fix small typo in the docs
42de1ce Merge pull request #150 from TyRoXx/conversion_warnings
b9608f2 turn implicit integer conversions into static_casts to avoid -Wconversion warnings
ca9b2d1 Merge pull request #148 from pah/fixes/solaris
5117f9e explicitly qualify C(++) library functions
c0bde81 rapidjson.h: explicitly import std::size_t to rapidjson namespace
e052c72 GenericValue: drop forced packing pragma
2475e95 Merge pull request #140 from kojik1010/mempool_null_check
a69dffb make MemoryPoolAllocator's Malloc work after Clear if a buffer was not supplied by the user
a5ffc5b Merge pull request #139 from pah/fixes/stack-growth-factor
296c7db Stack: adjust growth factor
7cca533 Update readme.md
d0f98d2 Fix a bug in dtoa on gcc

git-subtree-dir: thirdparty/rapidjson
git-subtree-split: 98f87905d96c2853a84c717b3de1e65571c7e4e2
Merge commit 'b25343cab849cf0741358690ef1541bd84cba0c1' into dev