adding script for automatic subtree merging
fix typo
document a little how the script works
tweak script description
--squash for merge implies --no-commit
A size_t should be format 'n' not 'i'.  Fixes #48.
Treat all size_t conversions equal
Merge pull request #46 from esc/subtree-merge-blosc.sh

Subtree merge blosc.sh