add ignore and readme.md

Author: branchzero

.gitignore

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+data/
+config/

readme.md

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+#Discuz X3.2 UTF-8 20150609 For PHP7
+
+This is a a PHP7 Port of Discuz! X3.2, based on Discuz X3.2 UTF-8 20150609.
+*Please Do Not Use For Production*
+
+###Changes
+
+  - Remove MySQL and Switch to MySQLi
+  - Modify *preg_replace e modifier* to *preg_replace_callback*
+
+###Notice
+
+There are still some bugs remaining to fix.
+
+###Known Bugs
+
+  - Template Engine's Eval tags seem to work abnormally. (seems like preg_replace with e modifier has addslashes but preg_replace_callback one doesn't to do)
+
+###Other
+
+Copyright: Comsenz Inc.
+Modifier: BranchZero Sun