Release 0.4.7: Numerical solver and integration

New features
- `root` for numerical root finding (#36)
- `integrate` for numerical integration (#42), using Romberg algorithm
- Auto-simplification of `i*i` as -1 (#411)

Bug fixes:
- `LastArg` and `Undo` were not correct after comparisons (#402)
- Invalid equation created for symbolic comparisions, e.g `A=B` (#403)
- Converting `100!` to a based number would display `#00` (#405)
- Avoid crash if running out of memory processing fractions
- Possible memory corruption during negation of complex numbers (#406)
- Fix typo in `User` settings menu, rename it as `UI`
- `->Q` could give incorrect result for decimal32 and decimal64 (#409, #410)

Enhancements:
- Accelerated editor when `VariablesMenu` is shown (#404)
- Being able to pass equations containing equal sign to solver (e.g. `X+1=3`)
- Insert a single colon `:` inside text
- Sharing more code between plotter, solver and integrator
- Simulator uses the DB48X keyboard by default
- Label for constants menu changed to `CNST`

Signed-off-by: Christophe de Dinechin <christophe@dinechin.org>

STATUS.md

@@ -163,6 +163,11 @@
 - [ ] Symbolic integration
 
 
+### Numerical evaluation
+
+- [X] Integration
+- [X] Root finding
+
 ### Other RPL functional areas (to be expanded)
 
 - [ ] Real-time clock

doc/commands/numerics.md

@@ -0,0 +1,27 @@
+# Numerical functions
+
+## ∫ (Integrate)
+
+Perform a numerical integration of a function for a specified variable on a
+numerical interval. For example `2 3 'X*(X-3)' 'X' Integrate` returns `-7/6`.
+
+The function takes four arguments:
+
+* The lower bound of the integration range
+* The higher bound of the integration range
+* The program or expression to evaluate
+* The integration variable
+
+
+## Root
+
+Root-finder command. Returns a real number that is a value of the specified
+variable for which the specified program or algebraic object most nearly
+evaluates to zero or a local extremum. For example, `'X^2=3' 'X' 0` returns
+`X:1.732050807568877293527446341953458`.
+
+The function takes three arguments:
+
+* The program or expression to evaluate
+* The variable to solve for
+* An initial guess, or a list containing an upper and lower guess.

src/dm32/qspi_crc.h

@@ -1,4 +1,4 @@
 
-#define QSPI_DATA_SIZE  1529164
+#define QSPI_DATA_SIZE  1529372
 #define QSPI_DATA_CRC  0x000cfed6
 

src/dm42/qspi_crc.h

@@ -1,4 +1,4 @@
 
-#define QSPI_DATA_SIZE  1527324
+#define QSPI_DATA_SIZE  1527508
 #define QSPI_DATA_CRC  0x000cfed6