test-merge-tools Some tests of merge-tools configuration and selection, mostly excercising filemerge.py

Account for symlinks when setting up HGTMP. On Mac OS X, several top-level directories are actually symlinks into /private. When setting up HGTMP, expand the symlinks so that later comparisons to or substituations with the actual path work as expected.

mq: allow qclone's -p option to use path alias Add support for running 'hg qclone -p foo bar' where foo is a path alias defined in the [paths] section of an hgrc file.