ASPIRE release 0.13

Release candidate #1 for ASPIRE v0.13

ASPIRE version for the weighting paper - only for the new variant of …

…the algorithm described in the paper.

Algorithm version corresponding to the weighting paper (2017). Heuris…

…tic weighting is not included (performed externally). Results analysis performed externally as well.

ASPIRE release version v0.12.

1. Added example file for using cryo_project examples/simulated_proje…

…ctions.m

2. Update documentation of projections/simulation/cryo_project.m
3. Update readme.txt

ASPIRE release version v0.11.