Workaround for suprious exceptions in -compileReport.

Passing the -compileReport flag makes the compiler produce readable
html reports from the xml reports produced by soyc; these xml reports
are parsed with SAX and in some cases SAX callbacks receive
corrupted values that cause an exception in the report producing
code.

Surprisingly, wrapping the GZIPInput stream into a BufferedInputStream
solved the issue.

This code that produces the reports shouldeither be rewritten to use
the original soyc data (not parsing the soyc output) or replaced by
a web app.

Change-Id: I9ced50ac0fee1ea2374b178a4ef34ecf96ac6c60
Removes broken disable-class-casting optimization in incremental compile.

In incremental compile, we shortcut generating castability information
when class casting is disabled. However same castability information
is also used for instanceof operation so the current code is incorrect.
This wasn't visible as I suspect that not many people runs super-dev with
disableCastChecking.

Change-Id: Ied0d18c24ac618e9da54824d903bffcd30c91c67