Update package-sissvoc-vanilla.sh

1.	Edit documentation to add Maven to pre-requisites for linux
2.	Edit the script (package-sissvoc-vanilla—no-build.sh) to get rid of:
a.	Redundant cd sissvoc & cd ..
b.	The –c from bash –c package-sissvoc-vanilla—no-build.sh
Merge pull request #1 from Fgia1/patch-1

Update package-sissvoc-vanilla.sh