Merge pull request #41 from jbrichau/gemstone2.4

Porting Zinc 2.3.2 to GS2.4 down to 3 failing tests!

```
**************************************************************************************
	Results for anArray( 'BaselineOfZinc') Test Suite
248 run, 241 passes, 4 expected defects, 3 failures, 0 errors, 0 unexpected passes
**************************************************************************************
*** FAILURES *******************
	ZnCharacterEncoderTests debug: #'testBeLenient'.
	ZnStaticFileServerDelegateTests debug: #'testIfModifiedSinceNotModified'.
	ZnBase64EncoderTests debug: #'testEmpty'.
**************************************************************************************
```

Thanks man!
Merge commit '6c7f67bdf87ad8052a48d5b9580c2950879e2dc6'

jbrichau: Merge remote-tracking branch 'svenc/master'
Merge branch 'master' into gemstone2.4
#[] is a literal Array in 2.4, not literal ByteArray
Need ZnByteEncoder class ... looks portable
latin2 encoding now supported
block in at:ifPresent: call in ZnStaticFileServerDelegate>>responseForFile:fromRequest: needs to have an arg
use correct travis url ... [ci skip]
fix Issue #40