Add option to Vagrantfile to share local gems
Add option to Vagrantfile to share local gems

Option disabled by default, but useful when linking to local gems in the
Gemfile.

mconf/mconf-web,becueb/MconfWeb,mconf-ufrgs/mconf-web,lfzawacki/mconf-web,mconftec/mconf-web-santacasa,fbottin/mconf-web,mconf-rnp/mconf-web,lfzawacki/mconf-web,fbottin/mconf-web,mconftec/mconf-web-santacasa,mconf-ufrgs/mconf-web,becueb/MconfWeb,fbottin/mconf-web,lfzawacki/mconf-web,akratech/Akraconference,becueb/MconfWeb,amreis/mconf-web,mconf/mconf-web,mconftec/mconf-web-uergs,mconf-rnp/mconf-web,amreis/mconf-web,mconf-rnp/mconf-web,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-santacasa,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-mytruecloud,mconf-ufrgs/mconf-web,mconftec/mconf-web-mytruecloud,mconf/mconf-web,mconftec/mconf-web-uergs,akratech/Akraconference,amreis/mconf-web,fbottin/mconf-web,becueb/MconfWeb,akratech/Akraconference,mconftec/mconf-web-santacasa,akratech/Akraconference,lfzawacki/mconf-web,mconftec/mconf-web-uergs,mconf-rnp/mconf-web,amreis/mconf-web,mconf-ufrgs/mconf-web,mconftec/mconf-web-uergs,mconf/mconf-web