Bombe 0.2.0

Bombe 0.2.0 continues the Bombe mission, further working towards making a cleaner codebase that can be used further afield than Lorenz or Survey.

Big thanks to @Minecrell, for his help towards this release!

• Drop dependency on Guava
• Add PrimitiveType
• Refactor Field/MethodSignature constructors

Changes

• Parsing for Types and MethodDescriptors has been overhauled, using readers for the both. This provides a much cleaner solution than what existed previously - dramatically improving the parsing of MethodDescriptors specifically.
• The dependency on Guava has been dropped.
• A PrimitiveType interface has been introduced, providing a direct replacement for the PrimitiveType enum that previously existed in Lorenz.
• The ‘convenience’ signature constructors have been replaced with #of(String, String) methods.