[FIX] web_diagram, unlink connectors/transitions between nodes from the diagram view (transitions IDs sent to the web client were strings instead of integers)
[FIX] point_of_sale: fixed rounding issue for pos order when discount added(maintenance: 615322).
[IMP] web_graph: renamed Quantity field into Count to avoid ambiguities
[FIX] report: page numbering rml reports

Save the NumberedCanvas state before doing a page reset.
The order of execution when rendering an rml report is the following:
1. init canevas (_pageNumber = 1)
2. render the page element
3. if still pages to render, afterPage method
4. if still pages to render, showPage method (_pageNumber += 1)
5. back to step 2 for each page
6. draw the ResetPage element (setting flag _doPageReset=True)
7. end the document build with afterPage & showPage method

The PageReset element should be executed at the end of the rendering of a story (subdocument) to reinitialize the page numbers to 0 (for new story) and insert the pageCount element for that story with the total number of pages (needed if want to use tag <pageCount/> in rml).

In case of NumberedCanvas (e.g. used in Trial Balance report), the numbering is generated at the end of the build using the _saved_page_states dict in the canevas.
To have an accurate _saved_page_states content, it needs to be saved before the pageReset.

Fixes #2225
[IMP] project: convert file CRLF to Unix end of line
[FIX] project: read access for project user

Backport of 79bed94 (project user access to resource.calendar) and adding the access to resource.calendar.attendance.
It is needed to compute function fields such as day_open (present in form view of project.issue)
Fixes #3201
[FIX] base: support float rounding with rounding_method=UP (ceiling)

Add rounding_method parameter on float_round method to offer
HALF-UP (default, usual round) or UP (ceiling) rounding method.
Use the second method instead of math.ceil() for product
reservations.

For UP, the python math.ceil() method uses "torwards infinity"
rounding method while we want "away from zero".
Therefore we use the absolute value of normalized_value to make
sure than -1.8 is rounded to -2.0 and not -1.

Fixes #1125 #2793

This is a cherry-pick of d4972ff which was reverted at 333852e due
to remaining issue with negative values.
[FIX] product: remove digits_precision from uom factor fields

Remove the hardcoded precision of 12 on factor and factor_inv,
to use the complete natural precision of NUMERIC types,
preserving all significant digits.

e.g. a UoM with a factor_inv of 6.0 used to be computed as:
factor_inv: 6.0 -> factor: 0.166666666667 (1.0/6.0, rounded to 12 digits) -> factor_inv: 5.999999999988 (1.0/factor)
which could lead to errors such 12*0.166666666667 = 2.000000000004 instead of 2.0

Slightly changed the way the ORM handles float fields to allow setting `digits=0`
as a way to explicitly require a NUMERIC value but without enforcing/rounding
the values at the ORM level, i.e. a truly full-precision field.

NUMERIC type has unlimited precision but is less efficient so should not be
used as the default behaviour, which is why we keep float8 as an alternative.

Modified the view to display the product UOM factor with a 5 digits value by default.
This value is for usability purpose only, the field still accepts bigger precision, by
setting the `digits` option on the field in the form view.

This change is safe in a stable series, the `digits=0` alternative is
treated the same as the default `digits=None` everywhere in the framework,
except when creating the database field.
[FIX] product.uom: safer handling of factor/factor_inv in UI

Add readonly attribute to avoid sending both factor and factor_inv value to the backend when saving.
This was possible if the user switched between uom_type to fill the two fields.
[FIX] ir_action: update context to get the real binary, else we have a traceback when we edit/view an ir_action_client where param is a binary field. Because we do safe_eval from the length and not from the binary
[FIX] account_followup: use %s string formatting to avoid concat None values
[MERGE] forward port of branch 7.0 up to 3a0af6a
[FIX] base: typo during forward port 0e4216361bf13cc0feb6f8d8200af80f343d066d
[MERGE] forward port of branch 7.0 up to b4d3701
[FIX] project: use utc timezone in report
[IMP] fields: initialized computed fields to a null value instead of a failed one

This should ease compute methods that assign a list to "update" a
one2many/many2many field.  With a failed value, the update crashes.
[IMP] fields: infer required=True on related fields

One can infer related=True on a non-stored related field if all fields on the
path are related.  This cannot be done if the related field is stored: when you
create a record, the database row is created first, and the related field is
computed and stored afterwards.  Making the field required in that case would
trigger a non-null constraint violation.
[IMP] fields: remove unused imports
[IMP] website_mail: actually render the html body of the template instead of escaping it
[IMP] [TEST] website_forum: security fixes + tests

- fixed voting, karma check could be avoided
- fixed posting comments, now correctly checking karma (not for
notifications)
- fixed bootstraping of users, now not allowed to ask questions by default;
added validation email that gives the first karma points required to
participate
- added tests