Add SketchTool latest
Renamed bitcoin to bitcoin-core

Closes #3634.
changed mentions of 'brew --prefix' to 'brew --repository'
Add Paw version 2.0.6

Paw has a rich database of HTTP headers, and it learns from your entries for URLs, headers, URL parameters and Form-Encoded or Multipart body.
Add iBabel v3
Add ChemDoodle v6.0.0
Add Tabula v0.9.3
Add Latexian v1.2.4
Update xACT 2.25 to 2.27
expand the `+` symbol in Cask names

closes #4275. references discussion in #4106.
Merge pull request #4298 from reelsense/patch-4

Update xACT 2.25 to 2.27
add exception for Cask name `bitcoin-core.rb`

references #4277, #3634
Merge pull request #4288 from vitorgalvao/prefix-to-repository

changed mentions of 'brew --prefix' to 'brew --repository'
Merge pull request #4240 from silvenon/master

Add SketchTool latest
suppress prompt to move ClamXav.app to app dir

references #4171
Merge pull request #4297 from mcs07/latexian

Add Latexian v1.2.4
Merge pull request #4296 from mcs07/tabula

Add Tabula v0.9.3
Merge pull request #4295 from mcs07/chemdoodle

Add ChemDoodle v6.0.0
Merge pull request #4294 from mcs07/ibabel

Add iBabel v3
Update Anki to 2.0.26