[Process Management] import changes from EQEmu to use EQ::EventLoop (libuv)

[chazix]

• eqlaunch
• loginserver
• queryserv
• world
• ucs
• additional sending of world->ucs ServerOP_KeepAlive

Reference commits:

• https://github.com/EQEmu/Server/commit/77c3841a49886ac544fa3a0286ec760839992e67
• https://github.com/EQEmu/Server/commit/16cfad1966cacd63e0d0ab93be9ec48762312d69

Test by:

• building on msvc, gnu; playing the game