* commit 'f222f71e':
  Step towards replacing bzip2/xz compression with Java implementation

* commit 'c7f9ce54':
  Regenerated tests.
  Copy a shareable structure only if its attributes are modified before sending a message through the channel.
  Without a single method with test annotation source tests are not picked up for execution.
  Corrected name of internal FastR function.

unit tests: switch time zone to GMT as it is the default when java.util.TimeZone is dysfunctional; fix several tests with incorrect placement of 'na.rm=XX'; fix several syntax errors in tests

Copy a shareable structure only if its attributes are modified before sending a message through the channel.

* commit '115405bc':
  Handle GNU R timeouts (e.g a crash) during unit test generation

* commit '5d94d5f0':
  checkstyle fix
  refactor context creation/initialization to match TruffleLanguage createContext/initializeContext

Merge pull request #308 in G/fastr from ~ADAM.WELC_ORACLE.COM/fastr:feature/rstudio_integration to master

* commit '7cbefa14':
  Used more appropriate API call to retrive a path from source section.
  Temporary fix for on-demand source section generation.
  Minor fix to functions returning contexts.