Used neuron as template for headers of a* easyblocks

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
adjust header as per #334 discussion, align permission bits

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
adjust location of authors information as per discussion in 99

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
Merge pull request #99 from fgeorgatos/334_fix_headers_for_easyblocks_a

Adjust headers of a* easyblocks, using "neuron" as template