Fix linker symbol collision

• Rename end() function to avoid potential duplicate with linker symbol - LucasMaheu

New API for updating variables

Variables can now be attached to a given topic with a given type:

uint8_t i;
attach_u8("foo", &i);

update_telemetry();

+Removed the unsused float parameter from update_telemetry
+Replaced void * types by uint8_t * type in IO functions
+Moved repository under continuous integration

Ergonomy

• removed set_state function that was too error prone. Forgetting to call it to pass the state immediately lead to segfault. Instead, state must be passed along with subscribe
• variables can now be directly updated using the update functions, courtesy of Dan Faudemer !
• Methods match and fullmatch that will return true if received frame topics matches with a given topic. Fullmatch also checks for payload type that should match a given type as well

Arduino support

• Support for arduino boards 🍻
• improvement of the build automation
• tests performed after integration on the final mbed and arduino distributions

Everything is now ready for adding continouus integration

Increased reliability

Fixed type casting issue leading to embedded programs freezing
Removed last dependency on memory allocation

First release

Basic functionnality with decent test coverage.

No string compression, no pure binary payload support, no CI system in place