Merge branch '198-bow-to-the-almighty-aleksolotl-in-order-to-gain-consent-for-using-the-legacybasetemplate' into 'master'

Resolve "Bow to the almighty Aleksolotl in order to gain consent for using the LegacyBaseTemplate"

Closes #198

See merge request !294

Bump version to 3.0dev0 and depend on newer core

See merge request !293

Fix spelling mistake

See merge request !292

Resolve "Adaptations for SPA operation"

Closes #197

See merge request !290

Resolve "[3.0] Drop Room from model"

Closes #192

See merge request !284

Fix error on daily supervisions page

See merge request !289

Merge branch '192-3-0-drop-room-from-model' of edugit.org:AlekSIS/official/AlekSIS-App-Chronos into 192-3-0-drop-room-from-model

Rename ugettext reference

See merge request !288

Resolve "Migrations fail with ProgrammingError"

Closes #195

See merge request !285

Merge branch '187-optimize-rendering-of-substituted-lessons-supervisions-on-daily-lessons-supervisions-page' into 'master'

Resolve "Optimize rendering of substituted lessons/supervisions on daily lessons/supervisions page"

Closes #187

See merge request !282

Resolve "AttributeError: 'NoneType' object has no attribute 'period'"

Closes #196

See merge request !286

Sort supervisions by period

Closes #190

See merge request !287

Resolve "Substitution form allows selecting students"

Closes #191

See merge request !283

Merge branch '186-fix-missing-pre-filtering-and-week-annotation-of-lessonperiods-on-daily-lessons-page' into 'master'

Resolve "Fix missing pre-filtering and week annotation of LessonPeriods on daily lessons page"

Closes #186

See merge request !281

Prepare release 2.5

See merge request !280