Updating the spaces vs tabs in the docs. Fixes #840
Fix sort on System Logs

On systems that do not return the list of files in alphabetical order,
the list of logs would simply be the reverse of whatever order they were
returned. Used arsort() instead of array_reverse() to sort the list of
files in reverse alphabetical order, so the logs are listed from newest
to oldest.
Fixes issue 847 Builder field_prefix undefined
Fix install where "\" is used as path separator (Windows) - #845

Backslashes are special in the replacement argument of preg_replace().
So we shouldn't pass it a full path.  We can still use preg_replace()
to remove a segment at the start/end of a path, then we can concatenate
the new segment(s) ourself.
install rename_folder(): simplify unnecessary preg_replace()
users auth: Fix harmless PHP warning on login (#848)

"Undefined variable: user"

PasswordHash doesn't need to know $user->password_iterations when checking
passwords, so we can just get rid of it.  (The saved hash already includes
this information).
Fix #852, $_table renamed to $table_name

Apparently when changing the $_table var to $table_name I was not
thorough enough, and when addressing #843 I was still not thorough
enough. In this case I searched the codebase for $_table and
$this->_table and ::_table. The migrations likely did not need the
change, but these three searches no longer return any results.