Merge pull request #513 from ggtakec/master

Added issue and PR templates.

.github/ISSUE_TEMPLATE.md

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+#### Additional Information
+_The following information is very important in order to help us to help you. Omission of the following details may delay your support request or receive no attention at all._
+
+- Version of s3fs being used (s3fs --version)
+ - _example: 1.0_
+
+- Version of fuse being used (pkg-config --modversion fuse)
+ - _example: 2.9.4_
+
+- System information (uname -a)
+ - _command result: uname -a_
+
+- Distro (cat /etc/issue)
+ - _command result: result_
+
+- s3fs command line used (if applicable)
+```
+```
+- /etc/fstab entry (if applicable): 
+```
+```
+- s3fs syslog messages (grep s3fs /var/log/syslog, or s3fs outputs)  
+_if you execute s3fs with dbglevel, curldbg option, you can get detail debug messages_
+```
+```
+#### Details about issue
+

.github/PULL_REQUEST_TEMPLATE.md

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+#### Relevant Issue (if applicable)
+_If there are Issues related to this PullRequest, please list it._
+
+#### Details
+_Please describe the details of PullRequest._