Merge branch 'hotfix/1.25.26' into stable
continuing switching 1.9.2 and 1.8.7 to head for securrity updates
use the same java requiremnts for debina jruby source and binary installation, udate #2871
add bountysource badge to the readme
fix installing 1.8.7, fix #2876
use --abort-on-dependentin gem uninstallation only on proper rubygems versions
updated tests
updated tests, update #2869
update bash_zsh_support, fix #2880, fix #2879
sort head after versions, keep other names before, fix #2881
1.25.27
add support for PCLinuxOS, update #2808
move Synology detection to the end as it uses grep on commonly existing file
try to install sudo on redhat like systems, update #2808
show all missing stuff and then fail, update #2808
add check for java.home while installing jruby, fix #2778
Merge branch 'master' into hotfix/1.25.27
Merge branch 'hotfix/1.25.27'
only use the first found name of redhat like system in /etc/redhat-release, update #2808
add a warning when user configured -j found, update #2837