Bug 24636: translate planning sections

Bug 24636: translate planning sections

This patch adds a new inc file to process
and translate plannig sections

To test:
1) Apply patch
2) Create new language files
(cd misc/translator; ./translate create xx-YY)
3) Verify new file is taken into account in
translation files
egrep -n budget_planning misc/translator/xx-YY*.po
check new strings in staff-prog file
4) Go to Administration > Budgets > Founds > Planning
select different options, check page title and
'Planning for...' phrase
5) Translate strings, install new language, enable it,
verify the text change with options like point 4)

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Joy Nelson <joy@bywatersolutions.com>
(cherry picked from commit b4c06e171730e1ed5d9b317670f25f01744cf742)