Fix #94
Fix #94

Restrict directories to Documents and Downloads folders. Note that the
file names were already restricted to .usfm, .usx, .sfm, .txt and .xml.

KLBradford/adapt-it-mobile,KLBradford/adapt-it-mobile,eb1/adapt-it-mobile,adapt-it/adapt-it-mobile,adapt-it/adapt-it-mobile,KLBradford/adapt-it-mobile,adapt-it/adapt-it-mobile,eb1/adapt-it-mobile,eb1/adapt-it-mobile