Development v1.0.9 (#28)

* Updated version to v1.0.8

* Updated to v1.0.9

* Work on standardized c++ formatting

Added a .clang-format file and started using "clang-format" with Google style formatting.  The only difference is that the columns are 100 instead of 80 wide

* Updated file to adhere to clang-format conventions

* Correct documentation

* Issue #25

Changed source to adhere to "clang-format" with Google standards

* Issue #25

Implement automated clang-format checking using Travis-CI

* Issue #25

* Issue #25

Updated web page header comments for clang-format

* Changes for Issue #25

* Update to let esp8266 travis work

* clang-format changes

* Issue #26 - corrected gas resistance variables in computation

* CLANG-Formatted document

* Issue #26 - corrected pressure computation

* Corrected CLANG-Format

* Issue #26

Added return status for getSensorData() function

* CLANG-Format changes

Author: Arnd