Fix Issue #56: Javadocs updated to SE 8

# Changes
Replaced all Java SE 6 URLs with Java SE 8 URLs in `/share/java`.
+ Updated `meta.txt` to reflect 1.8.
+ `data.url`/`fetch.sh`/`parse.py`: URLs were updated to the new Java SE 8 URLs.

## Testing
+ `fetch.sh` ran and downloaded the docs zip.
+ `data.url` URL manually tested in browser, works.
+ `meta.txt` changed one character.
+ `parse.py` due to Python difficulties w/ BeutifulSoup __untested__, please run. Only changes to URL, URLs manually tested and work.

`/lib/DDG/Fathead/Java.pm`: _left unchanged, no need to edit._