Merge branch 'stable-1.2'

# Conflicts:
#	data/locale/cs.ts
#	data/locale/en.ts
#	data/locale/ko.ts
#	data/locale/ru.ts
#	data/locale/uk.ts
#	data/locale/zh_TW.ts
#	include/Engine.h
#	plugins/nes/Nes.cpp
#	src/core/NotePlayHandle.cpp
#	src/core/SampleBuffer.cpp
#	src/tracks/SampleTrack.cpp

.travis/osx..before_install.sh

@@ -3,3 +3,6 @@
 set -e
 
 brew update
+
+# appdmg doesn't work with old versions of Node.js
+nvm install --lts

.travis/osx..install.sh

@@ -19,4 +19,4 @@ brew install $PACKAGES
 # fftw tries to install gcc which conflicts with travis
 brew install fftw --ignore-dependencies
 
-sudo npm install -g appdmg
+npm install -g appdmg