Extend PHP interface for Web RPCs

- add a PHP interface for lookup_account()
- PHP interfaces return error number as well as message
  (messages change; numbers don't)
- using symbolic error codes instead of hardwired numbers in PHP code
Fix last commit
Merge branch 'master' of ssh://boinc.berkeley.edu/boinc-v2
Commit from Pootle Demo by user admin.: 2781 of 2797 strings translated (2 fuzzy).
Commit from Pootle Demo by user admin.: 2658 of 2797 strings translated (101 fuzzy).
Merge branch 'master' of ssh://isaac.ssl.berkeley.edu/boinc-v2
locale: Update compiled localization files
Commit from Pootle Demo by user admin.: 2781 of 2797 strings translated (2 fuzzy).
client: report tasks within 1 hour of completion

... instead of 24.  Better user experience
at the expense of slightly increased server load.
Commit from Pootle Demo by user admin.: 969 of 2797 strings translated (261 fuzzy).
Merge branch 'master' of ssh://isaac.ssl.berkeley.edu/boinc-v2
DOC: Updates for 7.2.34
DOC: Update for Win x86
DOC: Update Android development version
Android translations
Commit from Pootle Demo by user admin.: 969 of 2797 strings translated (261 fuzzy).
Merge branch 'master' of ssh://isaac.ssl.berkeley.edu/boinc-v2
locale: Update compiled localization files
DOC: Include links for the release notes of both 7.0 and 7.2.
Merge branch 'master' of ssh://isaac.ssl.berkeley.edu/boinc-v2