connman: allow user editable main.conf

In recent months I have seen a number of cases where users need to
change ‘prefer ethernet’ to ‘prefer wifi’ or where users are trying to
enable tethering for ethernet or are running other daemons that add
network interfaces that should not be auto-managed by comman. All of
these require user editing of main.conf so this change moves main.conf
to /storage where it can be tweaked under-the-hood if needed.
vdr-addon: add option to override epg charset
tvheadend: update to tvheadend-3.9.681
Merge pull request #3248 from stefansaraev/vdr

vdr-addon: add option to override epg charset
Merge pull request #3250 from stefansaraev/tvheadend

tvheadend: update to tvheadend-3.9.681
installer: fix misleading menu entry

"Custom Install" is not install at all, it is there to be used for
upgrade / downgrade / repair. however, people are trying to use it
and get their disks not detected (which is expected)
so, make it clear what it does
Merge pull request #3253 from stefansaraev/installer

installer: fix misleading menu entry
vdr-plugin-dvbapi: update to vdr-plugin-dvbapi-bdcad3f
vdr-plugin-eepg: update to vdr-plugin-eepg-d7dc614
vdr-satip: update to vdr-satip-0.3.3
vdr-plugin-vnsiserver: update to vdr-plugin-vnsiserver-7d4aa81
vdr-addon: bump (4.1.7)
xbmc-master: update to xbmc-master-14-0bf4fd0, update RPi support patch, update FM patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
linux: update to linux-3.15-rc6

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge pull request #3254 from stefansaraev/vdr

bump vdr
linux: update ngene/octopus patch
service.openelec.settings: update to service.openelec.settings-0.3.17

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xbmc-master: update to xbmc-master-14-5ec51aa

Signed-off-by: Stephan Raue <stephan@openelec.tv>
scripts/unpack: simplyfing patching

Signed-off-by: Stephan Raue <stephan@openelec.tv>
alsa-utils: set mixer on more cards, thanks to 'fritsch' and 'seo'

Signed-off-by: Stephan Raue <stephan@openelec.tv>