On connection failure, remove the socket file before running the server.
On connection failure, remove the socket file before running the server.

Fixes #75.

beni55/gocode,mem/gocode,artnez/gocode,thousandhigh/gocode,mem/gocode,louiseGrandjonc/gocode,fjl/gocode,suncycheng/gocode,fjl/gocode,MerlinDMC/gocode,mdempsky/gocode,lmh008/gocode,thousandhigh/gocode,suncycheng/gocode,nsf/gocode,suncycheng/gocode,mdempsky/gocode,syohex/gocode,kerr-huang/Gocode,ghiden/gocode,lmh008/gocode,TheBB/gocode,ghiden/gocode,ghiden/gocode,nsf/gocode,thousandhigh/gocode,ghiden/gocode,louiseGrandjonc/gocode,mem/gocode,thousandhigh/gocode,syohex/gocode,fjl/gocode,syohex/gocode,louiseGrandjonc/gocode,kerr-huang/Gocode,lmh008/gocode,louiseGrandjonc/gocode,kerr-huang/Gocode,MerlinDMC/gocode,artnez/gocode,toqueteos/LightTable-Go,syohex/gocode,MerlinDMC/gocode,lmh008/gocode,mem/gocode,MerlinDMC/gocode,suncycheng/gocode,beni55/gocode,fjl/gocode,nsf/gocode,nsf/gocode,TheBB/gocode,beni55/gocode,kerr-huang/Gocode,TheBB/gocode,toqueteos/LightTable-Go,beni55/gocode,artnez/gocode,mdempsky/gocode,TheBB/gocode,artnez/gocode