Add scr_e, to not reassign to e.

Disable C++ exception for chipKIT Max32 example build_config

Update example build_config to include host build setting

Refactor functions in kernel.c

Fix indents in kernel.c

Pacify MSVC warnings for random.c

Fix document generator to remove trailing space in generated document.

Update generated document.

Add comment to Hash#each_pair. And change the line

Add comment about ISO.
Current place is misleading so change line No.

Add comments to Hash methods

Delete unused NameError#new. And add test.

Change to raise TypeError (Hash#merge, #merge!)

OP_ENTER fix segmentation fault

Add exception test

Remove use of mruby-proc-ext method in core test.

Pacify MSVC warnings for time.c

Refactoring test to use assert_nothing_raised.

Move `__method__` to mruby-kernel-ext since it's not ISO method.

libreadline requires libtermcap on OpenBSD.