Add gitignore and clang-format file

.clang-format

@@ -0,0 +1,13 @@
+---
+BasedOnStyle: LLVM
+ColumnLimit: 120
+IndentWidth: 4
+TabWidth: 4
+UseTab: ForIndentation
+AlignEscapedNewlines: DontAlign
+AllowShortFunctionsOnASingleLine: Empty
+AlwaysBreakTemplateDeclarations: true
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterFunction: true
+...

.gitignore

@@ -2,4 +2,10 @@
 Release
 Debug
 *.componentinfo.xml
-avrdude.bat
+*.elf
+*.o
+*.hex
+*.srec
+*.eeprom
+*.lss
+*.map