Support older versions of bash.

Lindgren did not have support for {1..4..2} type syntax for determining
directory names. Now seq is used to determine the k values.
Merge branch 'master' of github.com:inodb/metassemble
Merge branch 'master' of github.com:inodb/metassemble
Chang mpiexec of ray to a parameter (for aprun)
Merge branch 'master' of github.com:inodb/metassemble
Restructure metassemle and tests for qsub