Removed unsafe copy constructor and assignment operator, declared private
Fixed unsigned/signed mismatch + unsafe type converion warnings in tests
Comment
NcVar.getChunkingParameters: vector.reserve changed to vector.resize and removed reference to first element of empty verctor in the case of a scalar NcVar
Removed some references to elements of empty vectors. Calls from test_att and test_var2
Reference to element of possibly empty vector removed in NcDim::isUnlimited
All test running in debug mode
Removed several vector out of bounds debug assertion failures in ncGroup.cpp
Removed possible reference to element of empty vector in NcCompound::addMember
Removed some references to element in possibly empty vectors in ncVar.cpp
Changed NcCompondType::addMemeber
Added 'NcFile' member function 'sync' to expose nc_sync from netcdf-c
Merge branch 'NcFile_copy_assign' of https://github.com/jarlela/netcdf-cxx4 into jarlela-NcFile_copy_assign
Merge branch 'vc_warnings' of https://github.com/jarlela/netcdf-cxx4 into jarlela-vc_warnings
Merge pull request #7 from jarlela/vc_debug_assertions

Vc debug assertions
Merge branch 'sync' of https://github.com/jarlela/netcdf-cxx4 into jarlela-sync

Conflicts:
	cxx4/ncFile.h