removed unused variables / assigns never used
Merge pull request #1257 from schmurfy/cleanup

removed unused variables / assigns never used
mrbc: use binary mode on outfile

This solves the problem of incorrect bytecode generated by mrbc
for single files on Windows platform (which is by default text-mode)
Merge pull request #1258 from luislavena/mrbc-dump-binary

mrbc: use binary mode on outfile
Change fortmat to format.
Merge pull request #1259 from carsonmcdonald/typeofixfortmat

Change fortmat to format.
primary mruby fiber implementation
update Fiber.new doc
update error message
Change Fibder to Fiber and a couple other wording issues
avoid unnecessary pool/syms restoration
Merge pull request #1260 from carsonmcdonald/rewordtypo

Change Fibder to Fiber
Merge branch 'master' of github.com:mruby/mruby
error in initializing callinfo stack in cipush(); close #1261
remove unnecessary assignment
garbage collect context (fiber) properly
should have protected the return value from GC, even when the method is defined in Ruby; close #1263
manage fiber status (create|running|resumed|terminated)
add fiber tests
fiber do not work on MRB_NAN_BOXING