StaticJNI: Adding the support of the signatures

Signed-off-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>
StaticJNI: changing from fprintf to FatalError in generated code

Signed-off-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>
examples: Modifies complex example to add signature use

Signed-off-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>
Doc: Adding Tutorial for StaticJNI

Signed-off-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>