Remove variable 'overflow' because it's not used

The 'overflow' variable isn't needed
Change sevone_enum because it's an Scanner
Land #1937, @wchen-r7's fix for heap spray js code
Land #1938 - Change sevone_enum because it's an Scanner
Update ff svg exploit description to be more accurate.
Land #1940 - Update firefox svg exploit description to be more accurate
Add a more readable #inspect
Make the conditional correct for print_prefix

Fixes a bug introduced on #1936.
Land #1942
Remove meterpreter source

Replace with a README pointing at the new repo:
https://github.com/rapid7/meterpreter
Uses raw-xml-v2 Nexpose export for Nexpose import as this adds device-id
back to XML schema and will result in hosts that can be pushed back to
Nexpose.

[Bug #51521175]
Merge pull request #1943 from shuckins-r7:bug/nx-asset-group-push
Merge branch 'release'
Add module for MS13-037 CVE-2013-2551
Suport js obfuscation for the trigger
Add DEP bypass for ntdll ms12-001
Land #1946, remove Meterpreter source
Remove javapayload source

Replace with a README pointing at the new repo:
https://github.com/rapid7/metasploit-javapayload
Fix description, code and perform test
Land #1947, remove JavaPayload source