Merge branch 'master' of github.com:cscenter/SInGe

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Protobuff serialization added
Serialization debuged, tests added
travis protubuf support
code style fix
private field testing fix
gcc 4.9 in CI
try incremental_updater fix
incremental adapter fix. vcdiff executable not building at that moment
vcdiff executabe build fix
ubuntu build fix. vcdiff executable not building.
ubuintu build fix
Merge branch 'master' into protobuf_#9
Merge pull request #19 from Skipor/protobuf_#9

Protobuf #9