Adding mnemonic for `Upgrading system...` button
Updating french translation file for `Upgrade system...`
Fix notif in case of conflict not shown the "proper" way
Add "simulation" for when there are conflicts

In case of conflict, kalu can't compile the list of packages. Instead of having
to either just upgrade blindly, or figure things out manually, one can now run a
"simulation" to revolve the conflict, and see all the resulting pending
upgrades.

It uses kalu's updater GUI, but obviously there's no upgrade and it's all done
in temporary databases.
configure.ac: Fix missing libcurl.m4

Not in Arch's package since 7.32.0.-1
Fix compilation w/ DISABLE_UPDATER
Add support for '\e' in template variables

Mostly useful for CLI use, to use e.g. bold/colors in templates.
Fix not setting GPGDir in ALPM; Fixes #7
Update French translation
Add tweak ForceImages

Because I have a feeling some people might miss their images.
Bump to 2.3.0; Update HISTORY