Small changes to help text.

Addition of icons; some text is trimmed; some tidying up.
Fix /builder when applied to buildings under construction.

Ensure that the building name is never NULL.
Use the trace entity, not the entity ‘in’ the build log, for the name.
Remove Sys_SnapVector
Some canonicalisation of key names shown by /bind.
Fix displaying demo name when loading demo
Fix NET_IPSocket and NET_IP6Socket return type

It was causing a warning on Windows x64.
Prepend \ even for the dedicated server and tty client.

This fixes a bug where tab completed commands are executed with com_consoleCommand instead of as regular commands.
Fix flares for /cg_lightFlare 3 mode

This mode is no longer supported, and if it was active, the cgame wouldn't
clip flares at all. Now use mode 2 (time fade) for any value >= 2.
Add build test support (see http://about.travis-ci.org/)
Tell travis to use internal libwebp & libglew.
Have travis install dependencies more or less as in in debian/control; build daemonmap.

Ideally, debian/control would be parsed for this.
Also, this should pull in my libwebp-dev. If not, well…
Tell travis to fetch the public key for our Debian/Ubuntu repositories.
fix relation of entityname assignment for ET_EVENTS, so that the enum itself is also covered
Increase flare offset to reduce flickering.