add meson build system

After switching to meson, calling the `g-ir-scanner` command with the
`--warn-all` parameter in the generated `build.ninja` file will display these warnings:

```
Warning: MateMenu: symbol="DesktopEntryType": unknown namespace for identifier "DesktopEntryType"
Warning: MateMenu: symbol='desktop_entry_new': Unknown namespace for symbol 'desktop_entry_new'
Warning: MateMenu: symbol='EntryDirectory': Unknown namespace for identifier 'EntryDirectory'
```

The reason for these warnings is that we use `MateMenu` as `identifier_prefix`
and `matemenu` as `symbol_prefix`, but the symbols that report warnings do not
start with these prefixes.

1 files changed, 25 insertions, 0 deletions

diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..779efc2
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,25 @@
+option('introspection',
+  type: 'boolean',
+  value : true,
+  description: 'Build with GObject Introspection support')
+
+option('vapi',
+  type: 'boolean',
+  value: false,
+  description: 'Build to generation vala vapi file')
+
+option('collection',
+  type : 'boolean',
+  value : true,
+  description : 'Build with collection menu entry support')
+
+option('tests',
+  type : 'boolean',
+  value : false,
+  description : 'Enable test programs (default: no)')
+
+# For subproject usage
+option('package_subdir',
+  type: 'string',
+  description: 'Private sub-directory used when built as a subproject'
+)