LogData now only register files once with the FileWatcher.

Remove the code supporting old Qt versions.

WARNING, this breaks compatibility with Qt 4.3

Remove some tests affected by race conditions.

Also add a script to run unit tests.

Build tests with optimisation and allow profiling.

Correct the handling of non-LF terminated files when data is added to them.

Add a test for this particular case.

Update the getLength/getMaxLength functions to count expanded tabs.

Add new methods to AbstractLogData to expand tabs.

Works but slow, need optimisation.

Ensure selections stay within limits of the file.

Move the sending of the first load notification (0%) to the worker
thread to avoid a race condition on Linux.
Also change the default log level to DEBUG instead of DEBUG4.

Fix race conditions when interrupting a loading by another loading.

The operations in LogData are now queued and only started when the previous one
has been reported done by the worker thread.

Add a stop button in the loading progress bar.

Fix file size and number of lines for very big files.

Now uses qint64 for both file size and line number (but not for match index so
far).

Tests if the file exists before opening it.
This is because LogData now happily accepts a non existent file.
The unit test is also fixed accordingly.

Add a "random page" performance test.

Add notification and clear the search when the file is truncated.

Make LogData (at least mostly) thread-safe.
Also fix a bug in the line numbering (it started at line 1) and re-add the full sequential read test.

Adapted CrawlerWidget to work with async searches.

Make LogData blocking when a loading is in progress just like LogFilteredData.
Added a script to keep track of line/branch coverage.

Implement asynchronous loading and indexing in a worker thread. Also add a more comprehensive unit test suite for LogData.