availability_calendars 7.x-2.0

Some remarks abouth changes that may surprise you at first sight:
* I used the list at http://drupal.org/update/modules/6/7 to see what had to be changed
* drupal_set_title: http://drupal.org/node/242873
* Implements hook_... in comments: http://drupal.org/node/472642
* No explicit calls to schema hooks in (un)install: http://drupal.org/node/306151

Availability Calendars 6.x-2.x 2011-03-19
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- Issue #1093408 by fietserwin: Winter/summer time offsets cause incorrect month labels. Not a
problem in D7, timezones are used correctly, but changed there as well to keep code in sync.
- Issue #660502 by fietserwin: Custom colors using administration interface.
This change removed the code that was probably causing #1076786
- By nicholas.alipaz: General code cleanup and removal of whitespace.
- By fietserwin: commented out the code that probably causes #1076786.
- Issue #764406 by fietserwin: Allow admin to hide the calendar settings on the node edit page.
- By fietserwin: Changed notes savings to no longer save empty notes.
- By fietserwin: Added node delete handling (notes, day states and settings).
- By fietserwin: Made availability calendar fieldset on node edit form collapsible and collapsed
by default.
- By fietserwin: Removed translation of @date: incorrect use of t().
- By fietserwin: Removed unused function availability_calendars_menu_callback. As a consequence,
availability_calendars_get_settings does no longer have to support scope = nodetype.
- Issue #1060214 by fietserwin: Prepare for D7 port:
* Resolved warnings given by coder module.
* Replaced use of arg in function availability_calendars_node_edit_form
* Renamed function availability_calendar_getsettings to availability_calendars_get_settings.
* Renamed function availability_calendars_save to availability_calendars_save_node_settings.
* Moved availability_calendars_key to theme_availability_calendars_key: will from now on thus
also be accessed as a theme function
* Drupal stores what comes in, and encodes/filters on output: do not store check_plain'ed user
input on form submit (nid, year, month, notes) in availability_calendars_node_edit_form_submit,
instead added check_plain in theme_availability_calendars_month instead.
* Removed (most) E_NOTICE warnings.
* Extracted database access to separate functions.
* Split code over multiple files (module, admin, node, page and inc). This reduces load on
requests that do not use the calendar functionality.
- Issue #306461 by fietserwin: Added custom configurable availability states.
- Branched from 6.x-1.6 (kind of, not if you look at the git history, yes functionally seen).

Availability Calendars 6.x-1.x 2011-03-19
-----------------------------------------
- Issue #1009216 by fietserwin: Date translation problem.
- Issue #1048010 by fietserwin: Changed cache clearing on save (that caused the settings to not
persist).