Rename libresonic -> airsonic

Signed-off-by: Andrew DeMaria <lostonamountain@gmail.com>

contrib/assets/logos/svg/shadows/airsonic_dark_shadows_1600x512.svg

@@ -15,7 +15,7 @@
    version="1.1"
    id="svg8"
    inkscape:version="0.92.1 r15371"
-   sodipodi:docname="libresonic_dark_shadows_1600x512.svg"
+   sodipodi:docname="airsonic_dark_shadows_1600x512.svg"
    inkscape:export-filename="/home/jo/git/libresonic/new_assets/libresonic.png"
    inkscape:export-xdpi="96"
    inkscape:export-ydpi="96">

contrib/assets/logos/svg/shadows/airsonic_grey_shadows_1600x512.svg

@@ -15,7 +15,7 @@
    version="1.1"
    id="svg8"
    inkscape:version="0.92.1 r15371"
-   sodipodi:docname="libresonic_grey_shadows_1600x512.svg"
+   sodipodi:docname="airsonic_grey_shadows_1600x512.svg"
    inkscape:export-filename="/home/jo/git/libresonic/new_assets/libresonic.png"
    inkscape:export-xdpi="96"
    inkscape:export-ydpi="96">

contrib/assets/logos/svg/shadows/airsonic_greyscale_shadows_1600x512.svg

@@ -15,7 +15,7 @@
    version="1.1"
    id="svg8"
    inkscape:version="0.92.1 r15371"
-   sodipodi:docname="libresonic_greyscale_shadows_1600x512.svg"
+   sodipodi:docname="airsonic_greyscale_shadows_1600x512.svg"
    inkscape:export-filename="/home/jo/git/libresonic/new_assets/libresonic.png"
    inkscape:export-xdpi="96"
    inkscape:export-ydpi="96">

contrib/assets/logos/svg/shadows/airsonic_light_shadows_1600x512.svg

@@ -15,7 +15,7 @@
    version="1.1"
    id="svg8"
    inkscape:version="0.92.1 r15371"
-   sodipodi:docname="libresonic_light_shadows_1600x512.svg"
+   sodipodi:docname="airsonic_light_shadows_1600x512.svg"
    inkscape:export-filename="/home/jo/git/libresonic/new_assets/libresonic.png"
    inkscape:export-xdpi="96"
    inkscape:export-ydpi="96">