sysutils/ansible: Update to 1.8.2

• Update to 1.8.2
• Remove MASTERFILES, DISTFILES (unnecessary with USE_GITHUB)
• Update COMMENT
• Remove ACCELERATE option, move pycrypto to RUN_DEPENDS

While I'm here:

• Add LICENSE_FILE
• pkg-descr: Strip trailing slash from WWW: URL
• GH_PROJECT defaults to ${PORTNAME}, remove it

Changes:

https://raw.githubusercontent.com/ansible/ansible/v1.8.2/CHANGELOG.md

PR: 195557
Submitted by: Nikolai Lifanov <lifanov@mail.lifanov.com> (maintainer)