Add test for processing of symlinked static files and pages
Fix symlinked assets not being included, even in unsafe mode
Move tests for symlinked files to separate test cases
Preloads directory_watcher glob
Merge pull request #916 from AlexanderEkdahl/directory_pre_load

Preloads directory_watcher glob
Using directory_watcher 1.4.1.
1.5.1 has issues on ubuntu.
#916.
Merge pull request #909 from x3ro/symlinked-static-files

Fix symlinked static files not being correctly built in unsafe mode
Update history to reflect merge of #909.