WIP: Migrated processes to 1.0

[m-mohr]

ToDos:

• [ ] Support to work with ee.Arrays.*
• [x] apply: Implement complex apply (MM)
• [ ] array_element: Work with ee.Array data
• [ ] first, last: complex implementation
• [ ] filter_bands, load_collection: implement common name support
• [x] filter_spatial, load_collection: add filter_spatial again and implement geojson support (MM)
• [ ] load_collection: Implement support for properties filter (optional)
• [ ] merge_cubes: implement overlap resolver (see reduce_dimensions)
• [ ] if: JS only, implement ee.Algorithm.If support?
• [ ] mean, median, sd, variance: Implement complex reduce
• [ ] text_*: JS only, implement native GEE support?
• [x] reduce_dimension, apply: Implement context parameter (MM)
• [ ] reduce_dimension: Check whether labeled arrays work as expected
• [ ] Fix ToDos in code
• [x] Update examples (MM)

[m-mohr]

Added a todo list above.

[m-mohr]

All examples are working again so seems to be as stable as in 0.4. Therefore merged the current status into the 1.0.0 branch. @bgoesswe / @claxn: You can continue to work on this branch and then we can open another PR for the remaining changes, which makes it easier to track changes. I'll copy over the ToDo list then.