Update issue templates

Author: wilx

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,18 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Describe your problem here.
+
+Also, provide the following information:
+
+ - version: *version of log4cplus that manifest your problem*
+ - operating system, CPU, bitness: *what are your environement's OS, CPU's, and platform's characteristics*
+ - `configure` script, or CMake, etc., flags and settings: *what setting have you used to compile log4cplus outside of defaults*
+ - flags and settings used by your application: *what are the settings and comipler flags used by your application, are they compatible with those used for log4cplus compilation*
+ - compiler and its version: *what compiler and what versions are you using to compile log4cplus and your application*