Fix some val-in-for warning in testkit.
Fix wildcard throwable matches in testkit.
Import implicitConversions as needed in testkit.
Lose a bunch of postfix operators in lift-webkit.
Fix deprecated Elem constructor warnings in webkit.

In some cases we use .copy, others we just manually copy
over minimizeEmpty; we’ll probably want to switch to .copy
everywhere viable at some point.
Import existentials as needed in webkit.

Mostly annoying places they shouldn’t be necessary, but
such is life.
Fix webkit Enumerations using deprecated constructor.

We explicitly list out the Value calls now.
Drop an unnecessary structural type cast in webkit.

We keep the structural type, because e.g. FoBo is making use
of it, but we don’t need to use it here, and not using it evades
a reflective call warning (and thusly a reflective call).
Fix type erasure warnings in webkit.
Fix a concurrent map conversions in webkit.

ConcurrentMap is now deprecated in favor of concurrent.Map,
and the corresponding Java conversion function has also been
renamed.
Explicit BooleanThreadGlobal class in LiftSession.

We were using an anonymous subclass, which was apparently
being picked up as a structural type and whose ? method was
being invoked via reflection. No good.
Fix source match for Java array.

Before it was listed after java.lang.Iterable, but Rhino’s
NativeArray implements List, which implements Iterable,
which means we were never hitting that condition.
Import reflectiveCalls as needed in webkit.
Merge remote-tracking branch 'origin/deprecator-exterminator' into emergency-kits
Merge pull request #1538 from lift/emergency-kits

Emergency Kits: Fix src warnings in lift-testkit and lift-webkit