Update CONTRIBUTING.md

Language corrections (as well as spelling Linnovate right!). I would very much prefer you include a copyright assignment clause. Here you are only licensing the contribution. Some communitied do not like copyright assignment, but I personnaly, for this piece of code find it simpler.  At least for larger contributions and contributions made by companies. See http://dreamsongs.com/ihe/IHE-110.html for an example clause..
separate mean-cli from meanio
clean up indents
Merge master
add css.aggregate to scaffold
Scaffold bower.json and .bowerrc

Fix #30
Fix #31
show status for meanio and mean-cli
Merge master
more prototypal
Merge pull request #34 from andrija-hers/modulecleanup

Looking good, +1'ed from @fyockm as well - merging.
bumping version
Fixing typo in prototype.aggregateAsset

Typo keeps prevents assets being aggregated.
Merge pull request #35 from tkh44/patch-1

Fixing typo in prototype.aggregateAsset
bumping version to 21
splitting the core
added preinstall script for mean.json
added preinstall script for mean.json
preinstall as a separate command
mena.json to work with versions
crypto reference fix