Add note that it is not recommended to use shared hosters with no CLI access

[PVince81]

Reasons for not using shared hosters:

• no command line access, so cannot run OCC commands which might be required for doing repair, upgrades, etc
• PHP timeout values that are often low which might break long running operations (ex: moving a huge folder)
• restricted functionality
• cannot run background jobs reliably because of no crontab access: the workaround that runs ajax/cron.php on every page load is not reliable enough and also does not run when not using the web UI. ownCloud relies a lot on background jobs especially for long running operations that would cause PHP timeouts

[PVince81]

And some suggestions for people on shared hosters:

• get a vServer instead with root access
  or
• pick a provider from https://owncloud.org/hosting-partners/ in which case the maintenance burden is on the provider