Internal Fixes, etc. (#20)

* Start removing mixed usages

* Check for directories before opening

* Fix writing

* Kinda fix rebuild

* One more try

* Better internal handling

* Slighty fix a couple more things

* Update RVWorld Compress code to db7d750bba

* Fix build

Co-authored-by: Matt Nadareski <mnadareski@mparticle.com>

SabreTools.Library/External/Compress/ZipEnums.cs

@@ -29,6 +29,7 @@ namespace Compress
         ZipErrorTimeStamp,
         ZipErrorRollBackFile,
         ZipTryingToAccessADirectory,
+        ZipErrorWritingToOutputStream,
         ZipUntested
 
     }
@@ -49,4 +50,4 @@ namespace Compress
         ExtraData = 0x2,
         Trrnt7Zip = 0x4
     }
-}
+}