Create issue templates (#171)

* Create issue templates

* Update bug_report.md

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+<!-- Thanks for reporting a bug for this project. READ THIS FIRST:
+- Please make sure to submit issues in the right GitHub repository, if unsure just post it here:
+  - esphomeyaml [here] - This is mostly for reporting bugs when compiling and when you get a long stack trace while compiling or if a configuration fails to validate.
+  - esphomelib [https://github.com/OttoWinter/esphomelib] - Report bugs there if the ESP is crashing or a feature is not working as expected.
+  - esphomedocs [https://github.com/OttoWinter/esphomedocs] - Report bugs there if the documentation is wrong/outdated.
+- Provide as many details as possible. Paste logs, configuration sample and code into the backticks (```). Do not delete any text from this template!
+-->
+
+**Operating environment (Hass.io/Docker/pip/etc.):**
+<!--
+Please provide details about your environment.
+-->
+
+**ESP (ESP32/ESP8266/Board/Sonoff):**
+<!--
+Please provide details about which ESP you're using.
+-->
+
+**Affected component:**
+<!--
+Please add the link to the documentation at https://esphomelib.com/esphomeyaml/index.html of the component in question.
+-->
+
+
+**Description of problem:**
+
+
+**Problem-relevant YAML-configuration entries:**
+```yaml
+
+```
+
+**Traceback (if applicable):**
+<!--
+Please copy the traceback here if compilation is failing. If possible, also connect to the ESP and copy its logs into the backticks.
+-->
+```
+
+```
+
+**Additional information:**

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+<!-- READ THIS FIRST:
+ - This is for feature requests only, if you want to have a certain new sensor/module supported, please use the "new integration" template.
+ - Please be as descriptive as possible, especially use-cases that can otherwise not be solved boost the problem's priority.
+-->
+
+**Is your feature request related to a problem? Please describe.**
+<!-- 
+A clear and concise description of what the problem is. 
+-->
+Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A description of what you want to happen.
+
+**Additional context**
+Add any other context about the feature request here.

.github/ISSUE_TEMPLATE/new-integration.md

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+---
+name: New integration
+about: Suggest a new integration for esphomelib
+
+---
+
+<!-- READ THIS FIRST:
+ - This is for new integrations (such as new sensors/modules) only, for new features within the environment please use the "feature request" template.
+ - Do not delete anything from this template and fill out the form as precisely as possible.
+-->
+
+**What new integration would you wish to have?**
+<!-- A name/description of the new integration/board. -->
+
+**If possible, provide a link to an existing library for the integration:**
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Additional context**