[DB] Adding IXP and Infrastructure Entities
[NF] Adding CRUD for Infrastructures and hiden CRUD for IXPs
[DB] Adding relation between switcher and interface
[IM] Allowing to enable multi IXP mode
[IM] Updating switcher add and editing forms
[IM] Add SQL queries for upgrade
Merge branch 'master' into im-infrstructure
[IM] Update DQL to use new infrastructure table
[IM] Various improvements for multi IXP framework
[IM] If adding a new admin user, ensure they start with no notes pending
[IM] Switch to escapeshellcmd() from escapeshellarg() in mailing list password sync

This was causing issues for LONAP and this is just a test at a fix.

Also add -p noexec=1 option to print commands to stdout rather than exec()'ing them.
Merge branch 'master' of https://github.com/inex/IXP-Manager into lonap
[IM] Reverting "Switch to escapeshellcmd() from escapeshellarg() in mailing list password sync" - no effect
Merge branch 'master' of https://github.com/inex/IXP-Manager into lonap
Fix mistyped filename for template.
[HK] Complete changeset for @rowanthorpe pull request #37
Merge pull request #37 from rowanthorpe/master

Fix mistyped filename for template
Fix variable typo
Fix css typo
Remove duplicated section in config file