Renames avm1lib's $nativeObject and init
Adds AS2 flash.external.ExternalInterface
target argument of MovieClipLoader#loadClip and unloadClip may be level

According to the document[1,2], "target" argument of these methods may
be number (level).

[1]: http://help.adobe.com/en_US/AS2LCR/Flash_10.0/help.html?content=00001381.html
[2]: http://help.adobe.com/en_US/AS2LCR/Flash_10.0/help.html?content=00001389.html
Set Loader URL from URLRequest.
Merge branch 'master' of https://github.com/mozilla/shumway
Merge branch 'master' of https://github.com/mozilla/shumway
Merge branch 'master' of https://github.com/mozilla/shumway
Support non-smoothed bitmaps in Graphics fills, too

Doesn't work in Firefox yet, but that's a platform bug
Adds .height field to font metrics

We need this value lots of times, so it makes sense to precalculate it
Refactor TextField text run collection for cleanness and store more measurement data

Required for scrolling and `getLineMetrics`
Rename get/setSlot
Properly set and interpret default values in TextFormat
Preliminary real implementation of TextField#getLineMetrics()
Fixes bug in applying font from TextFormat
Fixes to calculation of TextField line metrics
Change stas test message printing utils to not use trace with multiple args

Apparently, we don't always treat those correctly, for some reason
Merge pull request #828 from tschneidereit/master

TextField fixes, plus non-smoothed bitmap fills
Clean up property enumeration, WIP.
Fix pixel snapping.
Fix lint error.