support more 2gb filesiz,checking exprie_in time for long-lived access token
Added to ignore
Found nice fix from User Indian4646, merging...

Merge branch 'master' of https://github.com/indian4646/grive

Conflicts:
	grive/src/main.cc
	libgrive/src/drive/Drive.cc
	libgrive/src/drive/Resource.cc
	libgrive/src/drive/Resource.hh
	libgrive/src/drive/State.cc
	libgrive/src/drive/State.hh
	libgrive/src/http/Agent.hh
	libgrive/src/http/CurlAgent.cc
	libgrive/src/http/CurlAgent.hh
	libgrive/src/util/File.hh
	libgrive/src/util/StdioFile.cc