v3.0.0-beta4

New:

• Add license to about section

Improvements:

• Update several translations
• Enable symbol before decimal (#341)

Fixes:

• Cursor location (@mwadle)
• Crash when root of negative base (#302)
• Crash when doing log or ln of a negative number (#316)
• Crash when recreating landscape main activity (#303) (@danthe1st)
• Everything after ').' in a calculation is ignored (#340)