Fixed incorrect cast error.

Removed argline from bot-dialogs pom. (microsoft#1190)

Switch to Jackson to correct JSON issue. (microsoft#1013)

Corrected README version

Merge pull request microsoft#768 from microsoft/trboehre/readme-update

Updated README's

Merge pull request microsoft#587 from microsoft/trboehre/expiredcert

Bumped parent pom to Preview5

Merge pull request microsoft#587 from microsoft/trboehre/expiredcert

Bumped parent pom to Preview5

Merge pull request microsoft#516 from haardikdharma10/master

Fixed a typo in README.md file

Fixed README typos.

Added default repo.url to the servlet sample POM.