v1.9.0 draft

[GeckoEidechse]

Features:
Allow titan loadouts to be modified in script through callbacks (#316)
Log all clientcommands if ns_should_log_all_clientcommands is set (#209)

Fixes:
Fix instant respawn exploit and block other Portal 2 commands (#204)
Fix rejection of legitimately-invalid UserCmds (fixes grapple issues) (#203)
Stop crashing on death with 4+ batteries + better drop logic (#366)
Gun Game: Fix potentially transferring score from leaving player to new joining player (#290)
Attrition - fix AI sometimes not spawning (#393)
Fixed custom rpaks being loaded more than once (#202)
Switch IsValveMod back to use a EnablerHook (#210)
Block developer squirrel functions (#21)
Re-enable Triple Threat (#402)

Cleanup:
Use strtoull instead of strtoll for uint64s (#198)
Move LZSS exploit segfault fix hook to ExploitFixes.cpp (#195)
Change localisation in Northstar.Custom to UTF16-LE (#390)
Somewhat better Marvins on Wargames and Deck using Navmeshes (#323)

Contributors:
TODO
ASpoonPlaysGames
BobTheBob9
Dinorush
F1F7Y
GeckoEidechse
Interesting-exe
KittenPopo
RoyalBlue1
taskinoz