[IMP] remove setting of color.ui

After further considering PR #21's arguments, the setup script should
not go around setting `color.ui`:

* it shouldn't be needed for recent gits with default compile
  settings[0]
* it may override advanced users's own colour configuration/
  customisations (or disabling)
* it forces default colours on users for which it may be useless
  (colour- blind) or even detrimental (other vision impairments)
* some linux distributions apparently default to idiotic pagers which
  can't handle ANSI colour codes by default and spew garbage to the
  terminal

[0] https://github.com/git/git/blob/master/Documentation/RelNotes/1.8.4.txt#L178-L180
check no match result in convert_pgerror_* functions
[FIX] report localcontext setHtmlImage Method error #24 #36
[FIX] small typo in readme

fixes #39
Merge 8c8edf0f977c5a5fa5ca4dfb11e60d0735230624 into 707366313c0aeaeae2378f24cece6e7921c12f2e
[ADD] doc files lost during git conversion
[ADD] tutorial beginning

blocked at introducing qweb template, ir.qweb lives in the registry but nodb -> no database
with --db-filter there's a database in the session (kinda) but need to fetch it and manually get the corresponding registry...
[IMP] notes
[ADD] plan
[ADD] website introduction
[IMP] some doc wording, remove profane comment
[ADD] models intro
[ADD] explain reason for new working model
[IMP] source formatting: fill-paragraph to 78

leaves a bit of room for diff mark & a small gutter in a 80c system
[FIX] use format_date for date fields
[ADD] lectures model, demonstrate date fields & options
[IMP] move data to demo, action and menus
[FIX] rST warnings & errors
[ADD] improved scaffolding, controllers scaffolding

alter tutorial module to use scaffolded structure
[IMP] simplify howto wording, add modules directory (output) to scaffold