Soulver 3 4+

# Non-decimal bases
- Support for unit expressions in bases other than decimal, like "0xF days in minutes"
- Added support for base 8 (octal) numbers: 123 as octal (= 0o173)
- Added support for converting into other bases using a phrase "as base x", like "0b101101 as base 16" (= 0x2D)
- Added support for converting into other bases using functions: bin(), hex(), int() and oct() (inspired by Python)

# Expression Formatting

Auto-spacing division slashes
- Soulver will now automatically insert spaces around slash division characters in certain cases, like in "500 / 40"
- There are still many cases where it's not preferred, like when working with fractions (1/3), rates (10 km/h), and Soulver will continue to not auto-space the division slash in these cases.

Thousands separators
- Soulver will now delete unnecessary thousands separators when deleting digits from the end of a number (i.e. "1,000" will now become "100" when deleting the final zero)

# Financial Functions
**Investment required for return**
- This function is useful for when you have a specific return on investment you'd like to achieve from an investment (like a bank deposit)
- Specify a target dollar amount you wish you receive over a given period of time in interest and the interest rate
- Soulver will tell you how large your initial bank deposit needs to be

Examples:
- "investment required for $10k/month at 5%" (= $2.4M)
- "deposit needed for $42k/year at 7.5%" (= $560k)

**Daily mortgage payment functions**
- daily payment on $1M over 30 years at 6.5% (= $207.67)
- daily interest paid on $1M over 30 years at 6.5% (=$116.40)

# Totals & Sub-totals
- Support for adding up numbers and percentages on different lines in subtotals
- For example you could type $500 on one line, and 10% on the next line. The total will now show $550.
- The floating total is smarter in some cases to adding up subtotal lines (thanks Sasha)

# Other

Clamp function
- "clamp 26 between 5 and 25" (= 25)
- "clamp 4 from 5 to 25" (= 4)

# Bug Fixes
- Fixed an issue with certain rounding phrase syntaxes that broke after the previous update, like "$110.00 USD in AUD to 2 digits" (thanks Ian & Mark)
- Fixed an issue where global currency variables were being rounded to 2 dp (thanks Shai)
- Fixed a bug where QuickSoulver would sometimes not respect editing setting changes (thanks Marcin)
- Fixed a bug where the floor() function wasn't working correctly with degree units (thanks Markus)
- Fixed an issue with very small numbers displaying as zero with notation disabled (thanks Eli)