Have build_wad.sh check for deutex

Fix a bug in CMakeLists.txt that still tried to link GLib/Fluidsynth
libraries when GLib wasn't found
Now loading additional PWADs specified by server

Fix problem (de)serializing player psprites

Check for (v)snprintf

Search for Google performance tools properly in CMakeLists.txt

Copy/Port m_file module from EE

Try and curb server CPU usage with no clients, WIP

Remove some old debugging

Flush logs after writing; this will slow logging but it's better than
missing log messages on crashes; I just hacked this; I'll probably do an
atexit thing or at least add a config option

Don't checksum saves in multinet mode; another hack

Remove undefined use of unions in m_buf

Const a lot of things in m_buf and m_obuf; m_cbuf is probably coming
soon

Fix problem reading booleans as u8 in m_pbuf

Fix problem reading strings in m_pbuf (cursor wasn't moving forward)

Rebuild tags