Add .gitignore and .ratignore files for various directories

doc/licenses/findbugs-jsr305-3.0.2/LICENSE

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+Copyright (c) 2007-2009, JSR305 expert group
+All rights reserved.
+
+http://www.opensource.org/licenses/bsd-license.php
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, 
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, 
+      this list of conditions and the following disclaimer in the documentation 
+      and/or other materials provided with the distribution.
+    * Neither the name of the JSR305 expert group nor the names of its 
+      contributors may be used to endorse or promote products derived from 
+      this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+POSSIBILITY OF SUCH DAMAGE.

doc/licenses/findbugs-jsr305-3.0.2/README

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+JSR-305 Reference Implementation (http://code.google.com/p/jsr-305/)
+--------------------------------------------------------------------
+
+    Version: 3.0.2 (originally 0.1-SNAPSHOT, redistributed by FindBugs 3.0.2)
+    From: 'JSR305 expert group' (https://code.google.com/archive/p/jsr-305/)
+    License(s):
+        BSD 3-clause (bundled/findbugs-jsr305-3.0.2/LICENSE)
+

doc/licenses/findbugs-jsr305-3.0.2/dep-coordinates.txt

@@ -0,0 +1 @@
+com.google.code.findbugs:jsr305:jar:3.0.2