Added a troubleshooting note about Java 1.7.0_25 to readmes

readme_developers.txt

@@ -42,6 +42,11 @@ This project depends on the following libraries.
     http://logging.apache.org/log4j/2.x/
     (JavaDocs are not available.)
 
+    There was a bug in Java 1.7.0_25 that causes log4j2-beta8 to hang
+    the moment a Logger object is created. 1.7.0_40 fixed it, 1.6 didn't
+    have the bug, and log4j2-beta9 will compensate, when it's released.
+    https://issues.apache.org/jira/browse/LOG4J2-322
+
 - Apache Commons CLI 1.2
     http://commons.apache.org/proper/commons-cli/
     (For JavaDocs, scroll down.)

skel_common/readme_changelog.txt

@@ -9,6 +9,7 @@ Changelog
 - Added commandline tips in readme_modders.txt
 - Fixed sloppy parser Validate error about things not allowed at root
 - Added a Preferences dialog as an alternative to editing modman.cfg
+- Added a troubleshooting note about Java 1.7.0_25 to readmes
 
 1.2:
 - Added a commandline interface

skel_unix/readme_for_unixlike.txt

@@ -88,3 +88,7 @@ Troubleshooting
       Run FTL, which will cause steam to copy fresh resources from its cache.
     Standalone users:
       Reinstall FTL.
+
+* If Slipstream hangs on startup: nothing in the prompt and no log...
+    If running "java -version" says 1.7.0_25...
+      That version of Java was glitched. Switch to 1.6 or 1.7.0_40+.

skel_win/readme_for_windows.txt

@@ -103,3 +103,7 @@ Troubleshooting
       Run FTL, which will cause steam to copy fresh resources from its cache.
     Standalone users:
       Reinstall FTL.
+
+* If Slipstream hangs on startup: nothing in the prompt and no log...
+    If running "java -version" says 1.7.0_25...
+      That version of Java was glitched. Switch to 1.6 or 1.7.0_40+.