Adjust tests for Mercurial 2.0

New bookmark handling requires Mercurial 1.8

Adjust tests for Mercurial 1.9

Merge with talklittle's fork

branchtags caching for speedup in repos with many branches

Adapt tests to latest bookmark changes

Update bookmarks handling for Mercurial 1.8.1

Update help output in tests to Mercruial 1.8.1

Adjust test script for Mercurial 1.6.3

Adjust test script for Mercurial 1.5

Fix a missing age equalizer in test script

Update tests

The default test script (test-compass) now also works outside the
Mercurial testing suite. Thus the other scripts have been removed.
Further test-compass is less verbose now, to only print out the
interesting parts to test.

Finally the following tests have been added to test-compass:
 - detect virgin repository
 - detect merge situation
 - correctly detect and handle bookmarks track.current option

Fix detection of bookmarks track.current option

Don't crash in virgin repositories

Show when in a merge situation

Fixes issue 2

Adjust help output for Mercurial 1.4

Somewhere between 1.3 and 1.4 Mercurial has changed the docstring
formatting used for command helps. This commit adjusts compass' help
output to look nice again in 1.4. Accordingly the test script has been
updated to succeed in 1.4.

Conider bookmarks track.current option

If the track.current option if the bookmarks extensions is enabled the
acitve bookmark is annotated with a '*'. Furhter, when being at a
bookmarked revisions with no active bookmark, a warning is printed that
none of the bookmarks will move on commit.

Fixes issue #1.

Adjust doc for 'hg help extensions'

Update test script and output