doc: Add the way to set the time on the master SPEC

doc:fix Maciej's comments on the document

This is just to avoid getting the dirty flag while getting git tag

Manu 191104 minor syntax fixes

Fix markdown format

test: Update docker files to compile the new structure of wr-starting-kit
Approved-by: Benoit Rat <benoit@sevensols.com>

Ben 191104 sdbfs format

doc:Fix maciej's comments and add section set previous kernel version

Merge branch 'develop' of https://bitbucket.org/sevensols/wr-starting-kit into manu-191025_update_Dockerfiles

Ben 191031 mergerepos
Approved-by: Manuel Castilla <manuel.castilla@sevensols.com>

- spec-init.bin is now using spec-init.bin-2015-09-18 (new golden
bitstream for SPEC with flash interface)
- wr_nic_lm32_sw.bin has been rebased on top of proposed_master and
include wrnic pfilter (wr-starting-kit-v3.0)

24657bb22f8c97c58de6077b202559f1  spec-init.bin
4862f18ff41a303a34da31f58fd51db5  wr_nic.bin
418c18af8289186f197c54f6d75fd1d7  wr_nic_dio.bin
59b9305d5a1bc2d25d07865b710c50ad  wr_nic_lm32_sw.bin

Also add .gitignore files for stuff generated for kernel compilation

Merge branch 'develop' of https://bitbucket.org/sevensols/wr-starting-kit into manu-191025_update_Dockerfiles

-add new dependencies
-update repository
-create file FRU

The numbering should only start for Introduction section.

We did try to use the YAML metadata block but for a strange reason it
does not work with starting-kit.md so we have decided to create a
specific Makefile rule for this purpose