add error handling to install.sh

fix default prefix in help text not being the default but the actual prefix

fix output not using PREFIX variable - fixes #270

add missing double-quotes and use lower-case local variable names - fixes #271

require Java 11 and update dependencies to recent versions

add .idea folder to .hgignore

(0) -10 -6 +6 +10 +30 +100 tip

mercurial