detect cyclic-include in Module#include
Add gembox feature
Add gembox which contains all core GEMs
Add gembox which contains all default GEMs
Use gembox for default build
Use gembox for travis build
FIX: Default build should use default GEMs and not all Core GEMs
IMPROVE: Move GemBox to more logical source location
Merge pull request #1217 from skandhas/pr-detect-cyclic-include-in-Moudle#include

detect cyclic-include in Module#include
Merge pull request #1218 from bovi/gembox

GemBox
fix gembox rake tasks to support Ruby 1.8
mrb_str_new_static(): zero copy string creation
Adds documentation for MRuby::GemBox usage
add extern funcs declaration and casts for cimpiling C++ compiler
move mrb_shared_string definition to src/string.c
fix mrb_string_shared memory leaks
rename hash related gc functions
Merge pull request #1220 from arton/master

add extern funcs declaration and casts for cimpiling C++ compiler
Merge pull request #1219 from cadwallion/gembox_docs

Documentation for MRuby::GemBox usage
fix memory leaks in mruby-random