Merge pull request #50 from Yahkob/feature

added error message for invalid plivo credentials
Fix settings.html to correctly display data
Merge pull request #52 from KiaFathi/kiaFeatures

Fix settings.html to correctly display data
Fix settings page city display
Merge pull request #53 from KiaFathi/kiaFeatures

Fix settings page city display
Rename PRODUCT-SUMMARY.md to PRESS-RELEASE.md
Add CONTRIBUTING.md
Merge pull request #54 from KiaFathi/documentationBranch

update documentation
Update README.md
Update README.md
further updates to README.md
remove usage instructions from README.md
Add standard STYLE-GUIDE.md
Improve README.md to link to style guidelines
Update README.md with link to PRESS-RELEASE.md
Update format of PRESS-RELEASE.md
implement further style changes to PRESS-RELEASE.md
Merge pull request #55 from KiaFathi/documentationBranch

update Documentation
Fix typo in PRESS-RELEASE.md
Merge pull request #56 from KiaFathi/documentationBranch

Fix typo in PRESS-RELEASE.md