new AzimuthalEquidistant projection contributed by Christoph Sperl of Catalysts
Merge pull request #8 from arraydev/azimuthal_equidistant

Azimuthal Equidistant projection
removed obpg-reader module
changed ceres.context to s3tbx and included the new splash image
updated s3tbx.config
renamed BEAM4_HOME --> S3TBX_HOME
renamed shell scripts
replaced BEAM by S3TBX
updated references to cli templates
BEAM4_HOME --> S3TBX_HOME
5.1.12 install4j runtime
updated version.txt
removed changelog
updated readme.html
BEAM --> S3TBX
removed BEAM from installer
removed changelog.txt from assembly
"snaps" extension for SNAP session
BEAM --> SNAP
BEAM --> SNAP/S3TBX
BEAM --> SNAP
visat-d --> snap-d
beam --> snap/s3tbx renaming