Share a lock file between processes that modify the xapian database.  Avoids a race condition and fixes #304
Share a lock file between processes that modify the xapian database.  Avoids a race condition and fixes #304

codeforcroatia/alaveteli,andreicristianpetcu/alaveteli,datauy/alaveteli,10layer/alaveteli,hasadna/alaveteli,Br3nda/alaveteli,petterreinholdtsen/alaveteli,datauy/alaveteli,obshtestvo/alaveteli-bulgaria,nzherald/alaveteli,petterreinholdtsen/alaveteli,petterreinholdtsen/alaveteli,TEDICpy/QueremoSaber,obshtestvo/alaveteli-bulgaria,10layer/alaveteli,4bic/alaveteli,TEDICpy/QueremoSaber,andreicristianpetcu/alaveteli_old,hasadna/alaveteli,TEDICpy/QueremoSaber,andreicristianpetcu/alaveteli,sarhane/alaveteli-test,sarhane/alaveteli-test,TEDICpy/QueremoSaber,andreicristianpetcu/alaveteli,sarhane/alaveteli-test,hasadna/alaveteli,4bic/alaveteli,andreicristianpetcu/alaveteli_old,Br3nda/alaveteli,andreicristianpetcu/alaveteli_old,4bic/alaveteli,nzherald/alaveteli,petterreinholdtsen/alaveteli,nzherald/alaveteli,10layer/alaveteli,andreicristianpetcu/alaveteli,datauy/alaveteli,4bic/alaveteli,andreicristianpetcu/alaveteli,andreicristianpetcu/alaveteli_old,obshtestvo/alaveteli-bulgaria,andreicristianpetcu/alaveteli_old,hasadna/alaveteli,codeforcroatia/alaveteli,Br3nda/alaveteli,Br3nda/alaveteli,nzherald/alaveteli,petterreinholdtsen/alaveteli,hasadna/alaveteli,Br3nda/alaveteli,codeforcroatia/alaveteli,nzherald/alaveteli,obshtestvo/alaveteli-bulgaria,hasadna/alaveteli,4bic/alaveteli,obshtestvo/alaveteli-bulgaria,codeforcroatia/alaveteli,TEDICpy/QueremoSaber,sarhane/alaveteli-test