Add Enumerable#all?(&block) tests
Add Enumerable#any?(&block) tests
fix bool number to macro
fix bug when `0 + other object`
fix bug when `0 * other object`
Refactor assert_true
float + nil should be raise TypeError
add Enumerable#first to mruby-enum-ext
Merge pull request #1874 from ksss/float-plus

float + nil should be raise TypeError
add unit tests for NilClass
Merge pull request #1873 from suzukaze/refactor-assert.rb

Refactor assert_true
Merge pull request #1872 from ksss/numeric-mul

fix bug when `0 * other object`
Merge pull request #1871 from ksss/numeric-plus

fix bug when `0 + other object`
Merge pull request #1870 from ksss/convert_type

fix bool number to macro
Merge pull request #1869 from suzukaze/add-test-enumerable.rb

Add test enumerable.rb
Merge branch 'master' of github.com:mruby/mruby
refactor Enumerable#{all?,any?} tests
move summary of mrbgems in default gembox to its spec
print gem summary in print_build_summary method
add summary to mrbgems without it