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
should set argc at proper position; close #1264
fixed a bug in initializing post mandatory block parameters
Add Fiber Test for issue #1264
Merge pull request #1265 from bovi/add-fiber-test

Add Fiber Test for issue #1264