Revert "Revert "Revert "Update to openblas 0.2.7"""

This reverts commit 27cc9bc95f9386c00cf8f1183f8cada5d81a7272.
Overhaul of version.jl, removal of COMMIT file, now stores all COMMIT-related information in base/build_h.jl, completely available to julia programs
Changes the contents of `VERSION` to 0.2.0, from 0.2
Pkg2.dir: this is just an alias for Pkg2.Dir.path
Bump openlibm to remove printf() warnings
Merge pull request #3683 from staticfloat/fullcommit

Overhaul of version.jl
Over-zealously removed necessary if statement in awk script
Added and exported interrupt()