Move CMake configuration file from "src" to top level directory
Made changes to child CMakeLists.txt to reference different location of top level CMake configuration file
Merge pull request #317 from nyue/master

Move CMake configuration file from "src" to top level directory
fixed build after commit b785b9d7a9576e1ffd6ad88b12f6b1013d8e99eb.
fixed generation of api reference docs after commit b785b9d7a9576e1ffd6ad88b12f6b1013d8e99eb.
fixed deployment of binaries to the sandbox after commit b785b9d7a9576e1ffd6ad88b12f6b1013d8e99eb.
removed redundant comments.
fixed crash when picking an object instance without a material.
Instantiation of objects from appleseed.studio

User is able to instantiate an object by right-clicking on it and
selecting "Instantiate...". The instance has a default pose and
no materials assigned to it.
Write OSL shaders in ProjectFileWriter.
Removed wrong comment.
Merge pull request #325 from est77/OSL_work

Write OSL shaders in ProjectFileWriter.
minor cleanups.
bug 321: fixing minor issues
Merge pull request #324 from marius-avram/B312

Instantiation of objects from appleseed.studio
added todo notes (related to issue #327).
building appleseed with SSE/SSE2 instruction sets on 32-bit Linux is no longer supported.