They can't do this!

Also they think i may be too sweaty as summer comes!

'May' is a very dangerous word to use - it's like saying that you can't employ women as they 'may' go off and get themselves pregnant. Ok, so you're not covered by discrimination law but your boss does have to have reasonable grounds for their request - it may not be discrimination but it could be seen as bullying.

he has no right to tell you how to get to work

Amen to that...

Ask for clarification of their concerns, and treat their response as grounds for negotiation. Accept and appreciate their concerns, and start to work on a compromise - find out what the issues are and work on a way to resolve them. Telling them to go fuck themselves won't achieve anything, but trying to come to a compromise shows that you're willing to put in the effort.

If the situation doesn't improve, try to focus on a few key points: if they say you smell, politely ask around the office in a concerned manner whether you're causing any bother - e.g. "I'm almost embarassed to ask this, but it's been getting warmer and just wanted to make sure I wasn't causing any problems in terms of smell or anything. Just let me know and I'll do something about it..." If it's about you actually keeping fresh clothes in the office make enquiries as to whether there's anywhere you can store your clothes so they're not visible or getting in the way...

Be totally reasonable, ratonal and calm, and make sure you can't be criticised for not trying hard enough, and everybody in the office will end up loving you, while it'll infuriate your boss no end...!