Rewrite the entire code-base

The following changes are focused upon:
- Modularity
- Doing away with globals
- No heap allocations
- Better command line interface
- Switch from Xlib to XCB
- More verbose type definitions
- Implement a single-file config by utilising X-macros

.clang-format

@@ -1,6 +1,8 @@
 BasedOnStyle: Google
 IndentWidth: 4
+InsertBraces: true
 ColumnLimit: 79
-AlignArrayOfStructures: Left
-AlignConsecutiveMacros: true
+AlignConsecutiveMacros: Consecutive
 AllowShortFunctionsOnASingleLine: None
+AllowShortLoopsOnASingleLine: false
+AllowShortIfStatementsOnASingleLine: Never