Fixed MS static analysis warnings

Fixed warning building in VS2012

Fix build for platforms not supporting realpath

src\reflection.cpp(297): warning C4267: 'argument' : conversion from 'size_t' to 'flatbuffers::uoffset_t', possible loss of data

sizeof() was promoting the type from uoffset_t to size_t.

Fix vs2012 warnings

Cleaned up a few warnings to allow VS2012 to compile idl_parser and idl_gen_text (for exporting binary protobuf blobs as JSON) cleanly under static analysis.

Added a check for a preprocessor definition that can be set if the platform you're building for doesn't support any notion of absolute path resolution/realpath()/etc.

flatbuffers\src\idl_parser.cpp(1516): warning C4244: 'argument' : conversion from 'int' to 'char', possible loss of data

flatbuffers\src\idl_parser.cpp(1525): warning C4127: conditional expression is constant
flatbuffers\src\idl_parser.cpp(1546): warning C4127: conditional expression is constant

Fixed conflicts and added missing generated files.

Change-Id: I4321c798543292d814c2c9e8b238c203b7526c7b

Change-Id: I60c900a2f7cbd88fe264f7b0dc78ef86b1580655
Tested: in Chrome.

Change-Id: Ieb252ce01446551699d935507bc95ee286fe1ddd
Tested: on Linux.

Fix #2775: Add parser option to skip unknown JSON fields

(PHP) fixes getting indirect table, also fixes getInt method on 32bit machine

Catchup

Change-Id: I3c3e88a79667d1733b6c47e43b55d8b2604ca8e2
Tested: on Linux.

This is implemented as a template function, since Table::CheckField
is not reachable by subclasses of Table (private base class).

Change-Id: I1ed4d47ce7cb672460ccab61cf7442eb9136b0f1
Tested: on Linux.
Bug: 26273432

This to allow the code to run on a greater range of build
configurations (that don't allow exceptions/RTTI).

If anyone ever doubts the usefulness of exception handling,
please show them this commit.

Change-Id: If7190babdde93c3f9cd97b8e1ab447bf0c81696d
Tested: on Linux.

Improving the README by linking to the SO tag, and changing SO wording.

Also included them in the C++ test.

Change-Id: Ib0c8470f0aacdf16616c27494abdda57a010195d
Tested: on Linux.

C# - Performance optimizations

Performance tweak to FlatBufferBuilder.CreateString method to remove the unnecessary byte buffer allocation

(See https://github.com/google/flatbuffers/issues/55#issuecomment-164031718 for stats)

Change-Id: I272f377742cc0a2c1bfccaa641b54eb9a8c762b6
Tested: on Linux.

Change-Id: I7727aeb478feb23d8ef66fd1ba9499b142b3ea7d
Tested: on Linux.

Add Get Bytes Method Generator for C#

Extend C# ByteBuffer Put method fix to unsafe methods

Update C# FlatBufferBuilder to reuse vtable array