Fixes running 'hg serve' with Windows executable and no explicit template path configured.
PY2EXE executables don't support __file__ but do place the directory of the
shared code library into sys.prefix.
Fixes bug 152.
%% no changes
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%% uncompressed contents in repo
this is a test
%% uncompress our working dir copy
this is a test
%% uncompress our new working dir copy
this is a test