use false for unknown timestamp instead of 'unknown'

set revInfo{'current'] when needed

do not set 'current' key in ChangeLog:getCurrentRevisionInfo(), instead set it during loop in Revision and Diff classes

obsolete ChangeLog:isExternalEdition

new methods: isLastRevision(), lastRevision()

fix wrong filesize of oldrev

new Changelog::saveRevisionInfo()

improve just created condition

case 1: new page or media
case 2: newer one that had existed but is already deleted via DW Editor

skip cached revInfo to keep "current" entry

to

set ChangeLog property currentRevision when instantiated

will cause more unittest errors during common_pageinfo_test

create ChangeLog::getCurrentRevisionInfo()

assign tentative revision for possible external edition, as $lastRev +1

Revert "disable external edit check to avoid unittest fails"

This reverts commit 162709daa8557d651e7afd7a6aa3e62f08bf0ade.

WIP: handle External Deletion using time() for dummy rev number

disable external edit check to avoid unittest fails

use getFilename() method instead of wikiFN()

add external edits to revision listings

- general function for retrieving external edit changelogline
- changelogline is cached after use of the function, then also retrievable by getRevisionInfo()

add external edits to revision listings

- general function for retrieving external edit changelogline
- changelogline is cached after use of the function, then also retrievable by getRevisionInfo()
- included in retrieveRevisionsAround() as well

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PSR2 style fixes

These are some simple whitespace/arrangement things that apparantly
can't be fixed automatically

Merge branch 'master' into psr2

split changelog classes into their own namespace

The remaining functions in inc/changelog.php should be moved into a
utility class.