use gimme_pkg helper in gimmes for smarter brew logic and to facilitate install/upgrades

gimmes/android-studio

@@ -4,7 +4,7 @@ set -o errexit -o pipefail
 gimme java
 
 if [[ "$OS" = "Darwin" ]]; then
-	brew cask install android-studio
+	gimme_pkg android-studio
 else
 	if ! has android-studio; then
 		URL='https://dl.google.com/dl/android/studio/ide-zips/2.0.0.20/android-studio-ide-143.2739321-linux.zip'

gimmes/atom

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -o errexit -o pipefail
 if [[ "$OS" = "Darwin" ]]; then
-	brew cask install atom
+	gimme_pkg atom
 	defaults write com.github.atom ApplePressAndHoldEnabled -bool false
 else
 	if ! has atom; then

gimmes/basictex

@@ -2,7 +2,7 @@
 set -o errexit -o pipefail
 if ! has tlmgr; then
 	if [[ "$OS" = "Darwin" ]]; then
-		brew cask install basictex
+		gimme_pkg basictex
 		export PATH="$PATH:/Library/TeX/texbin"
 		sudo tlmgr update --self
 		sudo tlmgr install titling framed

gimmes/charles

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -o errexit -o pipefail
 if [[ "$OS" = "Darwin" ]]; then
-	brew cask install charles
+	gimme_pkg charles
 else
 	echo "TODO: add Charles for Linux!"
 fi

gimmes/eclipse-jee

@@ -4,7 +4,7 @@ set -o errexit -o pipefail
 gimme java
 
 if [[ "$OS" = "Darwin" ]]; then
-	brew cask install eclipse-jee
+	gimme_pkg eclipse-jee
 else
 	if ! has eclipse; then
 		URL='http://www.eclipse.org/downloads/download.php?file=/technology/epp/downloads/release/mars/R/eclipse-jee-mars-R-linux-gtk-x86_64.tar.gz&r=1'

gimmes/google-chrome

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -o errexit -o pipefail
 if [[ "$OS" = "Darwin" ]]; then
-	brew cask install google-chrome
+	gimme_pkg google-chrome
 else
 	if ! has google-chrome && ! has chromium-browser; then
 		gimme_pkg chromium-browser

gimmes/java

@@ -2,7 +2,7 @@
 set -o errexit -o pipefail
 
 if [[ "$OS" = "Darwin" ]]; then
-	brew cask install java
+	gimme_pkg java
 else
 	has java  ||  gimme_pkg openjdk-8-jdk
 fi

gimmes/vscode

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -o errexit -o pipefail
 if [[ "$OS" = "Darwin" ]]; then
-	brew cask install visual-studio-code
+	gimme_pkg visual-studio-code
 else
 	if ! has code; then
 		URL="https://go.microsoft.com/fwlink/?LinkID=760868"