More documentation, more performance

Changes in AFiD 1.1 (2016-01-08)

• Added example and manual
• Support for MPI-3
• Default optimization -O2
• Check if input grid resolution can be factorized in small prime factors
• Fixed input file bou.in

MD5 checksum of afid-1.1.tar.gz: f2bfc82ff9b9b63f9da89d194173b979

The first release of the code

MD5 checksum: a8d253c28d9b56d43e5129df76321d8d