Layout update

- New, shadowed log list background
- 3 new buttons: spirituality, work, wellbeing
Layout gray

- Removed coloured drawables
- Added gray drawables
Merge branch 'master' into New-Layout-MERGE

Conflicts:
app/build.gradle
app/src/main/AndroidManifest.xml
app/src/main/java/com/example/xonfire/xonfire/LogList.java
app/src/main/res/layout/activity_log_list.xml
Merged gray layout to master
Automatic app.iml changes

- Changes from Hernan’s terminal battle
Refined button and background design

- Switched @drawable/x_on_fire_app_icon_gray to
@drawable/x_on_fire_app_icon_gray_bitmap
- Changed log_list_background_gray to new design (same name)
- Changed log_task_button_gray to new design (same name)
- Changed spirituality_icon_gray to new design (same name)
- Changed wellbeing_icon_ray to new design (same name)
- Changed work_icon_gray to new design (same name)
- Switched x_on_fire_app_icon_gray to x_on_fire_app_icon_gray_bitmap
Refined flame

- Changed app icon to app_icon_gray_triangular_flame_white
- Changed the background in activity_log_list.xml to
log_list_background_gray_triangular_flame
Added images for button, flame and log task button
merging Kien's changes with button functionality