add a FAQ entry about :memory: races
add a FAQ entry about :memory: races

Closes #204
Closes #309

Signed-off-by: Tycho Andersen <6b523322678240882acbb4da5312a12d8cd0082d@tycho.ws>

mattn/go-sqlite3,helight/helight_code,helight/helight_code,helight/helight_code,xeodou/go-sqlcipher,mattn/go-sqlite3,helight/helight_code,helight/helight_code,danderson/go-sqlite3,helight/helight_code,helight/helight_code,helight/helight_code,danderson/go-sqlite3,lyonel/go-sqlite3,accense/go-sqlite3,mattn/go-sqlite3,accense/go-sqlite3,xeodou/go-sqlcipher,danderson/go-sqlite3,lyonel/go-sqlite3,xeodou/go-sqlcipher,helight/helight_code,lyonel/go-sqlite3,accense/go-sqlite3