also update miniaudio to v0.10.4

* Update Renderer.cpp

* Tabulation edits

All double spaces in defaultShader replaced with "\t".

* Tabulation edits

All double spaces in defaultShader replaced with "\t"

* Update README.md: add libasound2-dev as dependency on Linux

* Update README.md: add libasound2-dev in the Linux section comment as well

Also handles:
- background color override for characters (it will only appear behind characters)
- selection background color override

Links added for Windows build help section.

Fixes crashes on clipboard handling.
Also dont paste when there's nothing to paste.

* fix incorrect use of invalid attributes

* add ALSA midi support

* add alsa midi enumeration

* add better alsa midi error handling

* add libasound2-dev dependency to travis-CI

Building Bonzomatic without ALSA is not very useful. Virtually every
desktop setup has ALSA, and it is required for sound/FFT input anyway.
Miniaudio sidesteps this build dependency issue because it links with
libasound dynamically.

Also remove retina option. It makes no sense since it messes all the scintilla mouse selection and doesnt mirror the resolution selection (by nature).

Fake supporting HiDpi for a better window UI appearance in windowed mode.

Change http to https in README.md where possible.

The type definition of `sptr_t' depends on the compiler and C++ standard
being used, see external/scintilla/include/Scintilla.h and Scintilla's
upstream commit "Change definition of uptr_t and sptr_t to use
standardised types and headers"[0].

On OpenBSD 6.5/amd64, Clang 7.0.1 defaults to C++14,  thus `NULL' is
defined as `nullptr' so assigning it to `sptr_t' aka. `long' will fail.

Fix all callers (to the legacy Scintilla code) by using zero:

	/WndProc(/s,NULL,0,
	/glBindBuffer(/s,NULL,0,
	/glUseProgram(/s,NULL,0,

0: https://github.com/mirror/scintilla/commit/91bbc3c933d663b3bc9f4572cf1ed02d77922fde

Signed-off-by: Gargaj <gargaj@conspiracy.hu>

Signed-off-by: Gargaj <gargaj@conspiracy.hu>

Also fixes the problem with VS2019 in Release mode by replacing ZeroMemory with SecureZeroMemory

was copying WCHAR size instead of char (wtf)