Zx

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+ ! Fixes and improves strict mode checking
+ Adds `error` and `warning` directives

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+ Adds missing default font (Haplo) for Radastan mode
+ ! Bugfixes and little improvements

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+ ! Fix infinite recursive include in Windows OS (yes, win sucks)
+ Little optimizations in `memset()` and `RND`
+ Standardize file includes like in cpp

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+ Added many more drawing primitives for Radastan Mode
+ Added instructions `ON .. GOTO` and `ON .. GOSUB`
+ Added UART library (by yomboprime) for serial communication
+ ! Several bugfixes and minor errors and better stability
+ Better code generation
+ Allows array initialization with label references
+ Switch `.bas` libraries (not the compiler) to **MIT license**

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+ ! Fixes a bug in the peephole (`-O3`) optimizer
+ Improved speed for `Integer` / `Unteger` operations
+ Improved speed for `Byte` / `Ubyte` operations
+ Improved speed for some 32 bit operations (`Ulong`, `Long`, `Fixed`)
+ Improved code speed for `-O3` optimized level
+ Improved travis and bitbucket pipelines CI (cache, added pypy)
+ ! Fixes and improvements to the ESXDOS library (by mcleod_ideafix)
+ Added new ESXDOS sample program (directory tree listing)

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+ ! Fixed some bugs in the assembler
+ ! Fixed a bug when calling a function in advance
+ ! Fixed a problem in tox, setting the terminal to UTF-8