Updated release notes

docs/RELEASE_NOTES.md

+# Pending release
+
+## New Features
+
+* Added back `promptE3Env.bash`, which runs `setE3Env.bash` and then sets the bash prompt.
+* Added descriptions for more targets when running `make help`
+
+## Bugfixes
+
+* Removed `loadIocsh` function, which was just a cover for `runScript`.
+* Removed references to `INSTBASE`
+* Fixed issue where `make cellinstall` would recompile a module.
+* Fixed permissions on `cellinstall`.
+* Fixed issue where `make debug` would recompile a module.
+* Fixed issue where `make install` would fail if you had not run `make build` first.
+* Removed all references to `sudo`. If `sudo` needs to be used, it should be done manually.
+* Fixed issue with module name checking which caused modules to fail to build on certain linux distributions
+
 # 3.3.0
 
 3.3.0 is a relatively major release with many bugfixes and a number of features added based on consultation