README: update initial instruction.

Homebrew handles the prefixes automatically.
added qq-music dmg
checksum on 1.3.0 version
added a cask for Garmin BaseCamp 4.2.4
Merge pull request #2241 from mjaschen/basecamp

Garmin BaseCamp 4.2.4
Makerware 2.4.1.35
Update node-webkit to version 0.8.3
Merge pull request #2242 from jdhealy/patch-2

Update node-webkit to version 0.8.3
Update Robomongo to stable 0.8.4
Merge pull request #2243 from jaymecd/patch-1

Update Robomongo to stable 0.8.4
Merge pull request #2227 from yangbodotnet/qq-music

Qq music
fix qq v3.0.2 sha1sum
Merge pull request #2244 from syhkiller/fixqq

Correct QQ v3.0.2 SHA1
Merge pull request #2193 from micrypt/patch-1

README: update initial instruction.
Geekbench 3.1.3
Merge pull request #2247 from ahbeng/geekbench

Geekbench 3.1.3
Add cask for Awareness
Merge pull request #2248 from lachlancooper/awareness

Add cask for Awareness
adds Tune Instructor recipe
Add new cask for Plug