Check of xsendfile is available.
Add custom filter of tags in the OPDS feed using facets.

Need more testing but should be ok.

re #21
With FBReaderJ 1.6.9 the problem with OPDS search is fixed

See https://github.com/geometer/FBReaderJ/issues/70
Add first file to make use of custom columns. Not complete at all.

re #32
Rename custom column php file. re #32

--HG--
rename : custom_column.php => customcolumn.php
Fix entry title. re #32
Change the default config for cops_x_accel_redirect to let PHP handle the
download. Should fix problem from KevNancy on IIS.

Warning all Nginx users who wants to still use X-Accel-Redirect must add
$config['cops_x_accel_redirect'] = "X-Accel-Redirect" in their config_local

fix #33
Add Custom columns through config. Only tested in HTML catalog for now

re #32
Release preparation
Add another extension in the mimetypes array. Mentionned a long time ago
by Jillmess and totally forgot about it.
Small fixes to facets handling. re #21

  * Fix ths duplicate of URL parameter
  * Fix when parameter is empty
Fix default config to reduce the minimum things to change.

Removed Nginx limitations which are not true anymore.
Change default title.
Add better explaination if wrong Calibre path is provided
Fixed detection of absolute path. Add a Windows mapped drive detection.
Reported by Kevnancy
Add a default config_local.php.
Fix book default sort.
simplify README
Try to explain a little the filters.
Update changelog