Add .hgignore file.

List all generated or temp files in .hgignore, so they
don't clutter the screen when running hg status.

Merge the gcc-4.4 support.

[gcc] Merge the gcc-4.4 suport to the default branch, from 1407:83083566fdd0

[configure] Use hg to compute the version string

Now that we have migrated to hg from svn, it does not make sense
to keep using svn tools to compute the version string, so switch
to using mercurial tools (that are much more flexible, BTW).

[finish-step] Use local variable in finish-step

When wrapping the tools, use a local variable when iterating.

[companion-libs] Fix spaces in help entries

Some help entries were missing proper alignment-spaces.

[populate] enhance documentation

This patch adds explanations on how
populate works internally.

[populate] fix documentation

This patch fixes the existing documentation:
- document -l and -L
- use syntax more in line with the help entry

/devel/gcc-4.4:
- add first sample using gcc-4.4

-------- diffstat follows --------
/devel/gcc-4.4/samples/arm-cortex_a8-linux-gnueabi/crosstool.config | 852 852 0 0 +++++++++++++++++++
/devel/gcc-4.4/samples/arm-cortex_a8-linux-gnueabi/reported.by | 6 6 0 0 +
2 files changed, 858 insertions(+)

/devel/gcc-4.4:
- TODO: remove completed items

-------- diffstat follows --------
/devel/gcc-4.4/TODO | 6 1 5 0 +-----
1 file changed, 1 insertion(+), 5 deletions(-)