added issue template

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+labels: bug
+---
+
+<!-- Before filling this issue, please read the Docs (https://github.com/fossology/Nirjas#readme)
+and search if the bug do not already exists in the issues (https://github.com/fossology/Nirjas/issues). -->
+
+### Description
+
+Please describe your issue in few words here.
+
+#### How to reproduce
+
+Describe the bug and list the steps you used when the issue occurred.
+
+#### Screenshots
+
+If applicable, add screenshots to help explain your problem.
+
+### Versions
+
+* Last commit id on master:
+* Operating System (lsb_release -a):

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Request a new feature in Nirjas
+labels: enhancement
+---
+
+<!-- Before filling this issue, please read the Docs (https://github.com/fossology/Nirjas#readme)
+and search if the bug do not already exists in the issues (https://github.com/fossology/Nirjas/issues). -->
+
+### Description
+
+Please describe your situation in few words here.
+
+#### Steps followed and expected result
+
+Describe the steps followed by you and your expected results after following the steps.
+
+#### Screenshots
+
+If applicable, add screenshots to help explain your problem.

.github/general_issue.md

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+---
+name: General issue
+about: Create a report to help us improve
+labels: general
+---
+
+<!-- Before filling this issue, please read the Docs (https://github.com/fossology/Nirjas#readme)
+and search if the bug do not already exists in the issues (https://github.com/fossology/Nirjas/issues). -->
+
+### Description
+
+Please describe your issue in few words here.
+
+#### How to reproduce
+
+Describe the bug and list the steps you used when the issue occurred.
+
+#### Screenshots
+
+If applicable, add screenshots to help explain your problem.
+
+### Versions
+
+* Last commit id on master:
+* Operating System (lsb_release -a):