[volume] BREAKING CHANGE - new widget instead of old ones

Having three widgets for volume led to a problem of code duplication -
same logic was duplicated three times. However when an issue was
discovered and fixed, it was fixed in only one of three widgets.
So I decided to create a volume widget from scratch, adding new
features, such as selecting input/output, better responsiveness,
easily customizable widget ui (bar, text, icon, icon and text, arc).
Should close #199, #198, #185, #182, #47, #122, #183.

4 files changed, 352 insertions, 0 deletions

diff --git a/volume-widget/icons/audio-volume-high-symbolic.svg b/volume-widget/icons/audio-volume-high-symbolic.svg
new file mode 100644
index 0000000..985c107
--- /dev/null
+++ b/volume-widget/icons/audio-volume-high-symbolic.svg
@@ -0,0 +1,88 @@
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+   xmlns:svg="http://www.w3.org/2000/svg"
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diff --git a/volume-widget/icons/audio-volume-low-symbolic.svg b/volume-widget/icons/audio-volume-low-symbolic.svg
new file mode 100644
index 0000000..7eb4531
--- /dev/null
+++ b/volume-widget/icons/audio-volume-low-symbolic.svg
@@ -0,0 +1,88 @@
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+<svg
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+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
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diff --git a/volume-widget/icons/audio-volume-medium-symbolic.svg b/volume-widget/icons/audio-volume-medium-symbolic.svg
new file mode 100644
index 0000000..11e44fe
--- /dev/null
+++ b/volume-widget/icons/audio-volume-medium-symbolic.svg
@@ -0,0 +1,88 @@
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+   xmlns:cc="http://creativecommons.org/ns#"
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diff --git a/volume-widget/icons/audio-volume-muted-symbolic.svg b/volume-widget/icons/audio-volume-muted-symbolic.svg
new file mode 100644
index 0000000..e577d05
--- /dev/null
+++ b/volume-widget/icons/audio-volume-muted-symbolic.svg
@@ -0,0 +1,88 @@
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