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Fix for issue 48: JSONValue.parse does not correctly decode UTF-8 bytes from an inputstream #1

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Here's a possible fix for issue 48 (https://code.google.com/p/json-smart/issues/detail?id=48).

The problem seemed to be that the parsing for InputStreams was taking a byte at a time from the InputStream and considering that byte to be a character. This causes some strangeness when parsing UTF characters beyond the usual ascii range.

The changes are confined to just the JSONParserInputStream class. Instead of using the InputStream directly, it now wraps it in a InputStreamReader (http://docs.oracle.com/javase/7/docs/api/java/io/InputStreamReader.html) which deals with multi-byte characters. As a side effect of wrapping it up in a Reader, the JSONParserReader can be used instead, which is why the class now extends JSONParserReader.

Hope this helps.

I'm less familiar with json-smart-v2, but could have a go at fixing the issue in that version too if you want.

from an inputstream",
https://code.google.com/p/json-smart/issues/detail?id=48).
    
Instead of taking a byte at a time from the InputStream, this now wraps
the InputStream in an InputStreamReader and uses the existing
JSONParserReader to read one character at a time.
    
A few extra parse() methods were added to take the source bytes'
character set as a parameter. This allows for cases when the platform's
default character set is not wanted.
c = (char) i;
pos++;
}
return super.parse(new InputStreamReader(in));

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Should this use the params instead of ignoring what is passed in?

Suggested change
return super.parse(new InputStreamReader(in));
return super.parse(new InputStreamReader(in), containerFactory, handler);

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