[prep-release-3.1.0-b1] Update version to 3.1.0-b1
[prep-release-3.1.0-b1] Add migration for 3.1.0-b1
[prep-release-3.1.0-b1] Prepare Changelog
[prep-release-3.1.0-b1] Add changelog for 3.1.0-b1
[prep-release-3.1.0-b1] Update build version to 3.1.0-b2-dev
Merge branch 'prep-release-3.1.0-b1' into develop

* prep-release-3.1.0-b1:
  [prep-release-3.1.0-b1] Update build version to 3.1.0-b2-dev
  [prep-release-3.1.0-b1] Add changelog for 3.1.0-b1
  [prep-release-3.1.0-b1] Prepare Changelog
  [prep-release-3.1.0-b1] Add migration for 3.1.0-b1
  [prep-release-3.1.0-b1] Update version to 3.1.0-b1
[ticket/11239] Including username before Overview title

Adding username to the page title to avoid confusion while managing
multiple users in ACP

PHPBB3-11239
[ticket/11071] Add fallback if requested style don't exist

PHPBB3-11071
[ticket/12274] Load correct T_TEMPLATE_PATH during update

PHPBB3-12274
[ticket/11239] Removing hard-coded, language specific possessive

PHPBB3-11239
[ticket/12274] Fix broke/missing jQuery asset paths in update script

PHPBB3-12274
[ticket/12274] Add core.js to the install footer

Required so phpbb var is defined, as it is used in admin.js.

PHPBB3-12274
[ticket/12281] Disable redis on travis until its fixed again

/home/travis/build/phpbb/phpbb/redis/redis.c:6141:34:
error: unknown type name ‘tsrm_ls’
make: *** [redis.lo] Error 1

The command "sh -c "if [ '$TRAVIS_PHP_VERSION' != 'hhvm' ];
then travis/setup-php-extensions.sh; fi"" failed
and exited with 2 during install.

PHPBB3-12281
Merge pull request #2144 from nickvergessen/travis/disable-redis

[travis/disable-redis] Disable redis on travis until its fixed again
Merge pull request #2136 from Elsensee/ticket/11071

[ticket/11071] Add fallback if requested style don't exist
Merge remote-tracking branch 'vsephpbb/ticket/12274' into develop

* vsephpbb/ticket/12274:
  [ticket/12274] Add core.js to the install footer
  [ticket/12274] Fix broke/missing jQuery asset paths in update script
  [ticket/12274] Load correct T_TEMPLATE_PATH during update
Merge branch 'ticket/11239' of github.com:geetakshi/phpbb into develop

# By geetakshi
# Via geetakshi
* 'ticket/11239' of github.com:geetakshi/phpbb:
  [ticket/11239] Removing hard-coded, language specific possessive
  [ticket/11239] Including username before Overview title
[ticket/7580] Add test for IF {VAR} is defined in templates

http://tracker.phpbb.com/browse/PHPBB3-7580
This test demonstrates that is possible to test if a
variable exists and then use it if it does, similar to
using isset(), but in template/twig syntax.
<!— IF {VAR} is defined —>{VAR}<!— ENDIF —>

PHPBB3-7580
[ticket/12269] Delete folder mods in language

Deleted mods folder in phpbb/language/en/.

PHPBB3-12269
Merge branch 'ticket/12269' of github.com:netdeamon/phpbb into develop

# By netdeamon
# Via netdeamon
* 'ticket/12269' of github.com:netdeamon/phpbb:
  [ticket/12269] Delete folder mods in language