Check installation errors

In case of error the command and status code will be shown.
If --install-error-action=abort the installation will be aborted.
Proper flushing of install logs
Fixed URLs in benchmark_config
Better tuned ThreadPool settings
Hooked up IIS.pubxml to get deployment working. Copied from aspnet
Updated gitignore file
Disabled 'debug' mode for servicestack
Added missing 'S' to the SQL Server IIS 'update' test URL
Merge pull request #434 from kppullin/servicestack_updates

Servicestack updates
Fix typo in message

There was a typo in a message in the Windows installer script.
Merge pull request #442 from fernandoacorreia/windows-php-typo

Fix typo in message
Merge pull request #428 from fernandoacorreia/install-error-checking

Check installation errors
bumped up Selmer version
Merge pull request #443 from yogthos/patch-1

bumped up Selmer version