Implement C API mrb_notimplement
Merge pull request #2636 from ksss/mrb_notimplement

Implement C API mrb_notimplement
fix mrb_notimplement typo
Fix mailing-list description
Add mruby debugger (mrdb)
mruby-1.1.0
Merge pull request #2637 from rmosolgo/not-implemented-error-msg

fix mrb_notimplement typo
Merge pull request #2639 from suzukaze/fix-mailing-list-description

Fix mailing list description; ref #2635
[ci skip] rephrasing about mailing list description; ref #2639
separate mrb_notimplement() and mrb_notimplement_m(); ref #2636
Merge pull request #2640 from mruby-Forum/v1.1.0

mruby-1.1.0
Fix an error when calling a method implemented in C by super() with arguments. This fix makes the following code workable:

Expected:

class MRBTime < Time; def self.new; super(2012, 4, 21); end; end
MRBTime.new # => Sat Apr 21 00:00:00 2012

Actual:

class MRBTime < Time; def self.new; super(2012, 4, 21); end; end
MRBTime.new # => can't convert nil into Integer (TypeError)
[ci skip] run spell checker on doc/debugger/README.md and fixed typos mentioned from @bovi and @rmosolgo; ref #2640
Merge pull request #2641 from sdottaka/super-fix

Fix an error when calling a method implemented in C by super() with argu...
fix heap-use-after-free
free return value of dirname()
free memory used by breakpoints
remove cast

C99+TC3, 7.19.7.1p2: [...] the fgetc function obtains that character as
an unsigned char converted to an int [...]
don't convert function pointer to object pointer
remove const type qualifier

clang 3.5.0 with -Wextra produces a -Wignored-qualifiers diagnostic.