Added option to disable build of tests and samples.

Added FLATBUFFERS_BUILD_TESTS option which can be used to disable
the build of flatbuffers tests and samples.

Tested:
Verified tests and samples are no longer built on Linux when
FLATBUFFERS_BUILD_TESTS=OFF.

Change-Id: Ic23ab827849ba2c4481de9ca86adc1ab8e6b828c
Initial commit of .NET port of FlatBuffers

Include C# codegen in flatc and .NET FlatBuffer access via the
FlatBufferBuilder class

Tested: on Windows.

Change-Id: If5228a8df60a10e0751b245c6c64530264ea2d8a
Removed the use of b.array() to support DirectBuffers.

Also removed Table extend Constants.

Change-Id: I1770b613c58094fa572a3b26a31f01bd5fb8fdbf
Fixed test that was incompatible with 64bit offsets.

Change-Id: I35984d0ab3e849bec6cdaa364a39f66f2c37b4d0
Tested: on Linux.
Added accessor in Java to get vectors as ByteBuffers.

Also cleaned up ByteBuffer usage in general: ByteBuffer.position
now universally indicates the start of a ByteBuffer.

Change-Id: Ic4bfb98f9df9501b8fc82de2c45db7d7311135ac
Tested: on Linux.
Added convenient vector from array construction for Java.

Change-Id: Ib3fd576cf9fa4b4058a9fd1bbe24a0859bc3917a
Tested: on Linux.
The parser and flatc now allow include directories to be specified.

Bug: 17139854
Change-Id: I0eac65d054951e00a8811ad1d80ba8c37012dbf0
Tested: on Linux.
Added missing assert.h to util.h.

This was only causing compiler errors on certain compiler configurations.

Change-Id: I110fb8c896f74aae7ef739e9a29c636393dbbde2
Tested: on Linux and Windows.
Prepended com.google to the Java namespace.

Bug: 16507831
Change-Id: I5beee18f63f174e425dc1ab395807b578d5f9477
Tested: on Linux.
Added C# generator to Xcode project.

Change-Id: I54ce51f16043664d706a79d1b31f2569f3311b70
Tested: on OS X
Refactored the Java and C# code generators into one.

Also made the C# implementation support unsigned types, and
made it more like the Java version.

Bug: 17359988
Change-Id: If5305c08cd5c97f35426639516ce05e53bbec36c
Tested: on Linux and Windows.
Added general codegen to Xcode project.

Change-Id: I5e21a08fe4b93382e5fbc3b911de5634b7aa88b9
Tested: on OS X.
Generate headers from spec, add option for installing targets