support for msvs 2015 RC

[KjellSchubert]

glog won't compile without these changes for msvs 2015 RC. I found the need for deleting the move ctor odd, especially since the libglog_static project compiled without it, only the libglog project needed it (apparently C++11 features cannot be disabled in msvs, see http://stackoverflow.com/questions/23386472/disable-c11-features-in-vs2013)

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[KjellSchubert]

I signed it

On Tuesday, May 19, 2015, googlebot notifications@github.com wrote:

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#30 (comment).

[googlebot]

CLAs look good, thanks!

[sergiud]

Changes seems to be obsolete. Please reopen if needed.