remove unneeded member in Extractor, move to function scope
transform negative numbers to positives by *(-1)
fix SCC computation in debug mode by clearing a vector
rename variable in XMLParser to make sure its name reflects the actual content
fix signed/unsigned comparison in assertion
install tools if activated
also build tools on Windows
Revert "also build tools on Windows"

This reverts commit 54a757a917f42452251d63b7231a16e870bc28f1.
rename member to distance
add c'tor to InputEdge of StaticGraph
prevent in-source builds
make c'tor of StaticGraph::InputEdge variadic to be more flexible against changing EdgeData types
reorder members for potentially tighter alignment
rename ContractorEdgeData members
make c'tor of DynamicGraph::InputEdge variadic to be more flexible against changing EdgeData types
add minor reformatting
add c'tors to QueryEdge and its EdgeData
make DeallocatingVector::emplace_back variadic and forward Args to contained element
make DynamicGraph::InputEdge c'tor variadic, forward args to EdgeData type
apply more emplace_backs and range based for loops to Contractor