Fix ensime-shows-uses-of-sybmol-at-point for DOS-style line endings
Fix tooltip for DOS line endings
Fix semantic highlighting for DOS line endings
make "rebuild Project" (C-c C-b r) work again

Explanation:
- the "defsetf" in ensime-def-connection-var evaluated the "store"
parameter at the wrong time
- because of that, "buffer-file-name" in
ensime-builder-track-changed-files was being evaluated inside
"ensime-with-connection-buffer" (thus evalutating to nil)
- because of that the buffer file name wasn't being saved
Build manager no longer discards compilation notes
Merge pull request #13 from edani/fix-rebuild

make "rebuild Project" (C-c C-b r) work again
Merge pull request #12 from edani/fix-dos-offsets

Fix a few more problems with external offsets in DOS mode
Merge pull request #14 from edani/fix-build-result

Build manager no longer discards compilation notes