[Patch] Start on sunday option

[josestefan]

the calander should have the option of starting on Sundays.

[JoshuaH]

Make WikiCalendar respect the locale setting

[JoshuaH]

I've attached a patch which makes it respect the locale setting. This may only work on Unix since it uses popen(). Also, at least if you're running Trac via Apache 2 and mod_fcgid, you'll need to add an explicit LANG setting to your DefaultInitEnv variables because mod_fcgid clears the environment except for whatever you specify in those variables.

[Ryan J Ollos]

(In [7324]) Use locale setting to determine if week should start on Sunday or Monday. Thanks for JoshuaH for the patch. Closes #1145

[Steffen Hoffmann]

(In [12989]) WikiCalendarMacro: Add optional week numbers, refs #1145, #7639 and #8175.

Rationale and constraints of current implementation:

• support any calendar per instance (use 'w' key-word) - no dependencies
• use basic start-of-week negotiation, if Babel is not installed
• use auto-negotiation for locale-aware Trac versions (since Trac 0.12)
• use advanced locale detection (similar to Trac 1.0.2)

Because I've found an issue with week number calculation in Babel, this plugin does it on its own for now.