Extend universal backend to support _eval.scm
Fix typo (not -> ##not)
Universal backend: on Python avoid deeply nested constants which cause a crash
Universal backend: implement ##unbound?
Universal backend: on PHP avoid warning when creating vectors and strings of length 0
Universal backend: minor cleanup
Universal backend: implement ##closure?
Add -j option to specify number of simultaneous make jobs.
Drop armv6 arch, add armv7s arch
Remove unneeded shift
Fix compiler path for xcode 5.1
Don't build twice for updating (although maybe we're supposed to?)
Only build the library; we don't need to build the compilers
Remove excessive checks from fl.* routines.
Merge pull request #77 from gambiteer/master

Remove excessive checks from fl.* routines.
Define and use ##bignum.copy, simplify integer division, have gcd use less memory.
Merge pull request #78 from gambiteer/master

Define and use ##bignum.copy, simplify integer division, have gcd use less memory.
Universal backend, JavaScript target, fix VM stack overflow when converting very long Scheme string to JS string
Fix a GC problem with the allocation of the result vector of ##process-statistics
Fix typo.