Rename Context -> JniUnoEnvironmentData

Change-Id: I97879d250ed0ed20d5e129ff3af6dbc2f5759078
Move JniUnoEnvironmentData into its own include file

Change-Id: I8e6fb1fc0acff781dd6e6b62018c7ccd5d0e2307
better documentation

Change-Id: Ife9a98cfe2166ccc7aac3904c7be4ea71443d857
Store JNI_info in JniUnoEnvironmentData instead of Bridge

...to have it available during JNI-UNO's uno_initEnvironment (see next)

Change-Id: I7a2f27b512fc74f418b4648d92dafbf0304eaa96
Fix JNI calls to AsynchronousFinalizer

...make sure the class is actually found, etc.

Change-Id: I5459d531be39b07594a975ae708a7611d1667a2f
update documentation

Change-Id: Icd966a850b7c5e276e8b1d74566a4ea02e5b4a5c