Added AddAndDeleteMultiComplex
Added AddAndDeleteMultiComplex

Renamed AddAndDeleteMulti to AddAndDeleteMultiSimple and added
a more complex one with more events, different size events and out of order
removing and adding. This is to demonstrate that commenting out lines 305-310
in src/fb-bindings-eventblock.cc is not the correct fix, as that passes
AddAndDeleteMultiSimple but not AddAndDeleteMultiComplex.

jacobalberty/node-firebird-libfbclient,jacobalberty/node-firebird-libfbclient,xdenser/node-firebird-libfbclient,xdenser/node-firebird-libfbclient,jacobalberty/node-firebird-libfbclient,jacobalberty/node-firebird-libfbclient,xdenser/node-firebird-libfbclient,xdenser/node-firebird-libfbclient