Finished instructions for docs

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@1027 212acab6-be3b-0410-9dea-997c60f758d6

Docs/src/int.but

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+\H{intinst} Integer Support
+
+\S{IntOp} IntOp
+
+IntOp \e{user_var(output) value1 OP}
+
+[value2] Combines value1 and (depending on OP) value2 into the user variable $x. OP is defined as one of the following:
+
+\b + ADDs value1 and value2 
+
+\b - SUBTRACTs value2 from value1 
+
+\b * MULTIPLIES value1 and value2 
+
+\b / DIVIDEs value1 by value2 
+
+\b % MODULUSs value1 by value2 
+
+\b | BINARY ORs value1 and value2 
+
+\b & BINARY ANDs value1 and value2 
+
+\b ^ BINARY XORs value1 and value2 
+
+\b ~ BITWISE NEGATEs value1 (i.e. 7 becomes 4294917288) 
+
+\b ! LOGICALLY NEGATEs value1 (i.e. 7 becomes 0) 
+
+\b || LOGICALLY ORs value1 and value2 
+
+\b && LOGICALLY ANDs value1 and value2 
+ 
+\S{IntFmt} IntFmt
+
+IntFmt \e{user_var(output) format numberstring}
+
+Formats the number in "numberstring" using the format "format", and sets the output to user variable $x. Example format strings include "%08X" "%u"