Add FileStore for read and write documents
Update Makefile with new dependencies and build
Add tests for FileStore read and write
Fix travis tests
Merge pull request #11 from jacquesrott/file-store-reimplementation

File store reimplementation
Update README with new requirements
Add dynamic array structure
Add tests for array.h
Merge pull request #12 from jacquesrott/ordered-hash-map

Dynamic array and Ordered hash map
Added btree cursor support
Moved binsearch_* functions to utils
Unified tree structs
Cleanup
Fixed build