ADN.  Gov. Sean Parnell (NGP Photo) last week signed a pair of bills crafted by Anchorage and Kenai legislators to try to boost Cook Inlet gas exploration and create natural gas storage options for reducing the winter supply crunch. The state tax concessions in the bills are huge: for their drilling, companies can shave tens of millions of dollars off their income and production tax liabilities.  State Sen. Tom Wagoner, R-Kenai, predicted a "stampede" of companies will descend on the Inlet to drill.  Some major Cook Inlet producers like Conoco Phillips, Marathon [...]