New runways, tarmacs, rental car facilities and other improvements will have cost Spokane International Airport more than $100 million by the time the dust settles in 2013. Now, for a sliver of that amount, the airport is investing in its most important asset, its people. The airport itself is one of the region’s most important economic assets, but employees say confusion about who was in charge, and where the airport was going, rolled morale flatter than the runways.