buildtest release 0.1.6

Features:

1. Add support for FlatNamingScheme in buildtest, added flag --module-naming-scheme to control setting
2. Add prototype functions

• get_appname()
• get_appversion()
• get_toolchain_name()
• get_toolchain_version()

3. Add support for logging via Python Logger module

Bugs:

• Fix buildtest version, in 0.1.5 release buildtest was reporting version 1.0.1
• Provide clean termination when no easyconfig is found
• Fix issue when no toolchain is provided in CMakeList.txt
• Optimize nested loop when performing --software-version-relationship