[Buildroot] [PATCH 0 of 3] gentargets: add scp and Mercurial download helpers

[Thomas De Schampheleire]

This patch series adds download methods for scp and Mercurial, and updates
the documentation (including some typo fixes)

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire at gmail.com>

---
 Config.in                   |  12 ++++++++++++
 docs/buildroot.html         |  29 +++++++++++++++++------------
 package/Makefile.package.in |  62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 86 insertions(+), 17 deletions(-)