change global Makefile by adding mrbgems to it
Change mrblib Makefile to include gems
Add init function for gems to init of core
make mrbc aware of the gem init
Add a first implementation of mrbgems with one fixed MD5 gem
Add TODOs to finalize gems
Small modifications for location
Relocated md5 source
Remove old location of md5 source
Relocate files
Generic sh-elf target support.
Add a contribution information file
Emphasis commands
re-formulate some sentences
Merge pull request #474 from monaka/pr-generic-sh-elf-support

Generic sh-elf target support.
Merge pull request #475 from bovi/contributing

More Contributing Documentation
Built generator for an variable amount of gems
remove second gem
Some additional changes to compile properly
Merge remote-tracking branch 'upstream/master' into mrbgems