bump testedwith version

adapt to stringutil.binary() of hg 4.6

make repo.filectx() pass arbitrary arguments to super class

Fixes compatibility with Mercurial 4.6, daef13da66fe.

fix typo in testedwith version

silence warning of unregistered config item

take binary data as text if utf-16/32 in candidates

use modern except clause

use modern import style

wrap changectx._parents and workingctx._parents

Otherwise, ctx.p1() wouldn't be wrapped correctly. This was spotted by the
change at hg 93bcc73df8d5.

bump testedwith version

wrap filectx.parents() so that annotated revisions should be correct

wrap filectx.filectx() appropriately

It's used in "hg annotate" for example.

avoid wrapping context object more than once

Since hg 00140039bd8f, repo[changeid] can accept context object and return it
as-is.

update testedwith list

add testedwith and buglink attributes

don't load from tortoisehg because it has no effect

use unfilteredpropertycache where approperiate for hg 2.5

mark enabled flag as propertycache because it shouldn't change

move wraprepo() to reposetup for compatibility with repoview

As of hg 5db16424142c, wrapping proxycls of repoview causes infinite recursion
of __getattr__().

ability to enable textful after wrapping repo