GPU: [Linux] Rewrite GPU

Song: Rewrite song function

Battery: [Linux] Rewrite battery

"

Misc fixes/changes

*SUSE: Changed ASCII behavior

In SUSE's `lsb_release`, they have different behavior for `-ir` and
`-d`, one output will be `openSUSE Leap 42.1` and the other will be
`SUSE LINUX 42.1`. This new behavior would also extend compatibility
with SUSE Linux Enterprise.

Solaris: Changed Solaris' getpackage behaviour and getdistro output

Some OpenSolaris/illumos-based distribution used various Linux package
managers such as dpkg, rpm, and portage (see more at
http://wiki.illumos.org/display/illumos/Distributions). It would make
sense for Solaris' case to be unified with Linux.

However, Linux's `pkg` detection (I don't know which distro is that) are
vastly different from Oracle Solaris/OpenIndiana's `pkg`, so a
workaround is used.