[MERGE] integrated EOL conversion support

[Ian Clatworthy]

Alexander Belchenko wrote:
> Ian Clatworthy пишет:
>> I'd greatly appreciate it if someone could apply this patch
>> on Windows, run "./bzr selftest test_eol" and confirm all
>> the tests pass there.
> 
> C:\work\Bazaar\mydev.packs\bzr-eol>python bzr --no-plugins selftest
> test_eol -v > test.log
> tests passed
...
---------------------------------------------------------------------
> Ran 18 tests in 16.654s
> 
> OK
> 12 tests skipped

Excellent! Thanks. As one of the primary users looking for this,
I'd be grateful for a review and/or feedback.

Thinking out loud, I wonder whether "windows" would be a better
choice than "dos"? I'm probably showing my age by using the latter.

I'm also considering adding a value called "clean". That would work
exactly like "exact" except it would warn if mixed line-endings
were found in a file. What do you think? Git has something like this
so I gather it's of value to users.

Ian C.