Add convenient gen_code soft link + update docs

.gitignore

@@ -24,11 +24,11 @@ autom4te.cache
 ar-lib
 **/.history/
 
-# Ignore the generated binaries, but keep the bin directory using a dummy HOLDER
+# Ignore the generated binaries, but keep the bin soft links.
 src/tools/gen_code/gen_code
 src/tools/ta_regtest/ta_regtest
-bin/*
 !bin/HOLDER
+!bin/gen_code
 
 ## File system
 .DS_Store

README-DEVS.md

@@ -1,23 +1,28 @@
 # Instructions for TA-Lib maintainers
 **You do not need to do any of this if you are only a TA-Lib user.**
 
-# How to generate "./configure" script
-Dependencies to install:
-- automake
-- libtool
-- autogen
+Development is done on Ubuntu, but the library can still be used on any Linux distribution, Windows and macOS.
 
-On ubuntu, just do the following:
-```sudo apt install automake libtool autogen```
+## How to generate "./configure" script
+Install dependencies:
+```$ sudo apt install automake libtool autogen```
 
-... then execute:
+Create/update all the "Makefile" related files:
+```$ autoreconf -i```
+
+## How to build gen_code
+Install dependencies:
+```$ sudo apt install mcpp```
+
+Build everything (includes gen_code):
 ```
-$ mkdir -p m4
-$ autoreconf -i
+$ cd ta-lib
+$ ./configure
+$ make
 ```
 
-# How to generate the .tar.gz
+Must be in a specific directory to run it:
+```
+$ cd ta-lib/bin
+$ ./gen_code
 ```
-$ ./configure
-$ make dist
-```

bin/gen_code

@@ -0,0 +1 @@
+../src/tools/gen_code/gen_code