build: Replace Autotools with Meson

Quick rundown of benefits:

- Much faster:
  - Autotools (with autogen): 22 seconds
  - Meson: 7 seconds
  - Meson (with ccache): 2 seconds

- Simpler:
  - ~1000 lines smaller
  - Single simple language

- Potentially better Windows (Visual Studio) support

What is not done:

- Complete Windows support
- OSX support (easy)

Closes #2013
Closes #1937
Closes #1803

src/fe-text/Makefile.am

@@ -1,9 +0,0 @@
-localedir = $(datadir)/locale
-
-bin_PROGRAMS = hexchat-text
-
-AM_CPPFLAGS = $(COMMON_CFLAGS) -DLOCALEDIR=\"$(localedir)\"
-
-hexchat_text_LDADD = $(top_builddir)/src/common/libhexchatcommon.a $(COMMON_LIBS)
-hexchat_text_SOURCES = fe-text.c fe-text.h
-

src/fe-text/fe-text.c

@@ -502,7 +502,7 @@ fe_args (int argc, char *argv[])
 
 	if (arg_show_version)
 	{
-		printf (PACKAGE_TARNAME" "PACKAGE_VERSION"\n");
+		printf (PACKAGE_NAME" "PACKAGE_VERSION"\n");
 		return 0;
 	}
 

src/fe-text/meson.build

@@ -0,0 +1,7 @@
+executable('hexchat-text',
+  sources: [
+    'fe-text.c',
+  ],
+  dependencies: hexchat_common_dep,
+  install: true,
+)