delete Gemfilelock

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
upgrade ruby env for the gem

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
complete gem spec

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
complete rakefile with official gem targets

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
check default exported function for FalkorLib::Common

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>